Demonstrative Evidence / Trial Presentations Expert Witnesses: 21

USAForensic is a boutique state-of-the-art forensics company with full-time labs in Phoenix, Arizona and Detroit, Michigan. Our booking office is on the east coast. This helps with an earlier start each day and with overseas cases.

Specializing in forensic Audio, Video, Cell Phones, Computers Photography & ”Cell Tower tracking” debunking.  USAForensic is court certified in Federal, US Military, US District, many State and county courts throughout the United States. International cases are not uncommon. Mr. Neumeister has worked in 23 countries over the past 40 years.

Clients range from the largest Law firms to private firms, large corporations, the Department of Defense, government agencies, advocacy groups, the DOJ to the innocence project.

Technology is flying past the court system. We’re here to work with attorneys to understand how to deal with digital or analog evidence, how to challenge it or how to get it admitted into evidence.

We prefer to work in the background assisting attorneys, even writing out Daubert 702 & 902 issues regarding other parties evidence submissions.

In a recent Federal Daubert hearing USAForensic worked with DOD JAG attorneys to get police cell tower tracking ruled inadmissible. The federal judge rule police cell tower tracking as “Garbage in, Garbage out”. 

Not a verifiable science, not peer reviewed, no scientific white-paper to support its use.

Over 600 cases in the past 3 years. From the very highest profile to simple straightforward forensic cell phone extractions or video and audio clarification for court use.

To us Data is Data & takes no side, but it has to be verifiable data.

David Smith specializes in Recording Authentication, Speech Enhancement, Voice Identification/Elimination & Forensic Audio Analysis. Sound Testimony's proprietary's hardware/software systems recover intelligible speech and other sounds from noise-intensive backgrounds & poorly recorded media. Mr. Smith has more than three decades of professional forensic audio analysis experience in criminal and civil cases including murder, corporate fraud, employment discrimination, sexual harassment, labor, and family law. Mr. Smith consults with counsel offering audio forensic evidence examination, analysis, litigation support, expert advice, expert testimony, and related expert witness services including preparation of cross-examinations and courtroom presentations. Clients include Prosecutors, Defense Attorneys, Family Law & General Practice Attorneys, other Legal & Investigative Professionals, HR Departments, Corporations, Private Detectives, & Individuals.

Services Offered:

• Recording Authentication / Tampering & Editing Detection
• Forensic Quality Enhancement / Voice and Sound Extraction
• Intelligibility Improvement
• Transcript Review & Correction
• Voice Recognition and/or Elimination
• Expert Testimony
• ALL services are available for Webcams, Body-cams, Dash-cams, and Security Cameras

Authentication and/or Intelligibility Improvement of:

• 911 calls
• Accidental Recordings
• Cell Phone Recordings
• Video Recordings
• Portable Recorders
• Interviews
• Depositions
• Meetings

Setec Investigations offers unparalleled expertise in computer forensics and electronic discovery, providing highly personalized, case-specific forensic analysis and litigation support services to assist in the investigation, handling, and prosecution of computer-related crimes or misuse.

Setec Investigations combines today's most advanced computer forensics and litigation support expertise with a business- and legal-friendly approach, resulting in a sound analytical foundation that carefully balances critical investigative requirements with vital legal and evidentiary needs.

Setec Investigations incorporates a cross-disciplinary team comprised of computer forensic investigators, attorneys, law enforcement specialists, and seasoned business professionals who have established a proven track record of success since 1997.

Services Overview

Setec Investigations possesses the necessary combination of technical expertise, understanding of the legal system, and specialized tools and processes enabling the discovery, collection, investigation, and production of electronic information for investigating and handling computer-related crimes or misuse.

Explore our range of service offerings:

Computer Forensic Investigations

Computer forensics and enterprise investigation services identify, gather, analyze, and preserve electronic evidence to establish a sustainable posture for internal or legal action.

Electronic Discovery

Manage large volumes of electronic data and quickly identify and isolate electronic evidence that is critical to the success of a litigation.

Litigation Support

Legal consultants and attorneys translate litigation issues into strong case strategies that effectively utilize electronic evidence.

Expert Witness

Supports the resolution of security incidents and active litigations by offering impartial and independent expert testimony, opinions, and customized reports in legal proceedings.

R. Kevin Smith PE, BSME, MMAE, has been a specialist in Engineering Forensic Safety and Design for 35 years. He has consulted on over a 1,000 matters nationwide. Mr. Smith is a registered professional engineer and holds a BSME and MMAE from the Illinois Institute of Technology in Chicago. He is board certified forensic engineer through the National Academy of Forensic Engineers. He specializes in Material Handling Equipment Safety, including lift trucks, dock safety, truck loading, conveyors, and aerial work platform safety. Mr. has been actively involved as a member of the committee that writes the Safety Standard for Low Lift and High Lift Trucks (ASME/ANSI B56.1) for over 30 years. He also serves on the B56.6 committee (rough terrain lift trucks) and the ANSI A92.5 and A92.6 subcommittees (self-propelled elevating work platforms). Litigation Support - Mr. Smith formerly worked for Triodyne, Inc. for over 15 years as a forensic engineer/principal engineer. As President of R. K. Smith Engineering Inc., for over 25 years, he currently has a laboratory for examination and testing, and owns or has access to varied testing equipment and tools. Kevin Smith has testified at depositions and trials on several hundred matters. He has performed hundreds of investigations into product failures involving injury and property damage, and has reconstructed numerous accidents. His expertise is available to counsel representing both Plaintiff and Defendant. Mr. Smith also was previously on the Adjunct Math faculty at Prairie State College for 13 years. Areas of Expertise:

Forklift Trucks Aerial Work Platform Lifts Product Testing Material Handling / Lifting / Rigging Equipment Accident Reconstruction Machine Guarding Safeguarding Warnings

Agricultural and Construction Equipment Skid Steer Loaders Stability Testing Loading Dock Safety Consumer Products / Testing OSHA Citations Codes & Standards Standard of Care in Design

View R. Kevin Smith's Consulting Profile.

Mike Wakshull is a civil and criminal court-qualified document examiner who partners with legal clients to dissect the evidence presented in handwritten and computer-generated questioned documents. His valid approach often produces winning arguments during the trial. Wakshull applies his scientific training to examine questioned documents which is a court requirement. He uses generally accepted practices such as SWGDOC and ANSI/ASB standards. His laboratory is well-equipped with high powered digital microscopes, VSC80, ESDA, high quality digital scanners, and software. He has built a large forensic reference library. Wakshull is skilled at creating and explaining complex exhibits in easy-to-understand language and pictures. His courtroom approach is to teach and engage the trial participants—opposing attorney, judge and jury.

Mike Wakshull holds a graduate school certificate in Forensic Document Examination. Since 2010 Mr. Wakshull has worked and studied in the science and discipline of Document Examination and Handwriting Analysis. He is one of only a handful of forensic document examiners with graduate school training in the science of forensic document examination. His opinion is always based on sound fundamentals of evidence. Mr. Wakshull has spoken at International and local conferences and seminars and also holds professional certifications that bring unique skills to your case. As a Certified Quality Engineer, Mr. Wakshull studied the science of variability and applied this to the analysis of handwriting and documents. As a Certified Information Systems Auditor, he applies his knowledge of information systems and technology to the analysis of documents.

Q9 Consulting, Inc. Has both an extensive research library and laboratory. Q9 Consulting, Inc. serves Southern California counties of Riverside, San Diego, Orange, San Bernardino, and surrounding regions. Mike has worked cases from 29 states and five countries. Work is accepted from all other locations.

Areas of Expertise:

Contracts Wills (Printed and Holographic) Deeds Affidavits Employment Agreements Checks Insurance Claims Social Security Cards Anonymous Letters Crime Scene Writing

Notarized Writing Photographs Threatening Letters Graffiti Altered Documents Handwritten Notes Computer Generated Pages Medical Records Loan documents Robo signed documents

View Mike Wakshull's Consulting Profile.

Principle Forensics is a national Media Forensics Laboratory. They Recover, Authenticate, Enhance, and Analyze all types of recorded evidence, including Video, Audio, and Digital Images. Principle Forensics backs all their work with experienced, highly trained, expert testimony.

Nick Barreiro, BAC, AVFA, DIVRT, Chief Forensic Analyst, is a Certified Audio Video Forensic Analyst and an FBI-trained member of the Digital Imaging and Video Recovery Team. During his 15-year law enforcement career, he was a patrol sergeant, technology project manager, media forensics expert, detective, digital evidence specialist, and patrol officer. Prior to his career in law enforcement, Mr. Barreiro was an audio engineer and producer in California. He also worked for KBMB radio in Sacramento and has extensive experience and training in audio enhancement and analysis.

Litigation Support - Mr. Barreiro works with attorneys representing plaintiffs and defendants in civil or criminal matters in which Audio, Video, or Image Evidence plays a key role. He has tremendous technical knowledge and training, but also extensive experience on the witness stand.

Mr. Barreiro has enhanced and analyzed digital media from simple slip-and-fall cases and minor traffic accidents to complex investigations such as homicides and officer-involved shootings. He has testified 100s of times in criminal cases, civil cases, arbitration, and depositions. A highly trained and experienced forensic analyst, he provides technically detailed and precise results with expedited turnaround times.

Video, Audio, and Image Forensics

Evidence Recovery Authentication Enhancement Synchronization Analysis Redaction

Photogrammetry Facial Recognition License Plate Recognition Public / Media Release Court Exhibit Preparation

Timothy W. Monsees, is a partner with the firm of Monsees & Mayer, P.C. For over 30 years, he has focused his practice on litigating complex Personal Injury cases. 

Background - Mr. Monsees graduated with honors from the University of Missouri-Columbia School of Law in 1981. He is admitted to practice in Missouri, Kansas and Texas. Mr. Monsees is recognized by Best Lawyers in America, Missouri Super Lawyers, Kansas City Business Journal “Best of the Bar”, and for many years has been recognized by Martindale-Hubbell with an “A/V” rating. He regularly presents at seminars helping to instruct other attorneys on trial practice skills. 

Mr. Monsees restricts his practice to representation of injured parties in litigation of product liability, construction & industrial accidents, professional negligence, and medical malpractice. Mr. Monsees’ firm has received national recognition for litigation related to injuries from defective sporting equipment and from defective firearms. 

Litigation Support - Mr. Monsees provides expert witness services for counsel representing injured parties. He addresses issues related to rules violations, time limits, discovery omissions, trial strategies, procedure, standard of care, and ethical violations. 

Areas of Expertise:

• Legal Ethics
• Legal Malpractice
• Medical Malpractice
• Personal Injury
• Demonstrative Evidence / Exhibits

View Timothy Monsees' Consulting Profile.

Mr. V C Misra is a leading Forensic Handwriting, Finger Print and Document Examiner with over 21 years of experience. He has solved and given opinion on thousands of cases in India, UK, USA, Canada, Japan, Australia, Germany, Italy, France, Russia, South Africa and UAE. Mr. Misra's Expertise Includes:

• Examination of Handwriting, Signatures, Fraudulent Additions and Alterations
• Approximate Age of Documents
• Photo Static and Scanned Transplantations of Signatures
• Traced, Freehand and Impersonation Forgeries
• Denial of Normal or Disguised (Changed) Signatures
• Anonymous Letters
• Body Writings on Account Opening Forms
• Denial of Withdrawal of Money
• Development of Latent Finger or Palm Prints from the Cheques
• Bank Documents by Ninhydrin (Chemical) Method Used for Impression Sweat on Paper
• Opinions on Folds
• Sequence of Strokes and Distinction Between Inks
• Insertion of Typed or Printed Matter
• Fake Currency Notes
• Credit Card Forgeries
• Identification of Computer Typed Documents
• Fake Seals and Rubber Stamps

Mr. Misra's Expert Opinion is Available in the Following Languages: English; French; German; Russian; Spanish; Hindi; Gujarati; Urdu; Marathi; Regional Languages of India or Abroad. Clients Include:

Air Force Police Bank of Tokyo Bechtel (India) Bennett & Coleman Birla Soft C.R.P.F. Delhi Police Delhi University Duncan Industries Electrolux I.C.I. Fertilizer IIT New Delhi & Kanpur

Industries & MNC's J & K Bank JNU New Delhi L.I.C. Main Detective Agencies Private Parties Punjab National Bank Skanska Standard Chartered Bank State Bank of India U.P. Financial Corporation U.P. Police

August Meyer, QDE is a court qualified Forensic Handwriting and Document Examiner. He has been trained in the examination of handwriting and documents to include simulated signatures, disguised writing, altered documents, ink and paper analysis, and anonymous and threatening notes. 

Since 2014, Meyer has worked cases ranging from medical malpractice to title transfers. Through the National Gang Crime Research Center (NGCRC), he has approximately 175 hours of training and education in gang-related activity. In 2016 he was invited to be a guest presenter to the American Handwriting Analysis Foundation and gave a seminar covering gang culture, structure, and graffiti. In this presentation he showed how gang members will often work their symbols into their handwriting allowing an examiner to identify possible gang affiliations and rivalries from nothing more than handwriting.

Litigation Support - Meyer has worked cases across the country from Las Vegas to Indiana. He consults with attorneys to review opposing expert's reports on handwriting to identify and exploit weaknesses. He has successfully testified in court resulting in favorable resolutions for his clients. 

Areas of Expertise:

Signature Authentication Disguised Writing Altered Documents Ink and Paper Analysis Anonymous and Threatening Notes Wills Quit Claim Deeds Medical Malpractice Insurance Fraud

Medical Documents Titles Deeds Contracts  Checks Credit Applications Loan Applications Prenuptial Agreements Receipts Insurance Claims

Meyer participates in continuous training and annual proficiency testing from the Scientific Association of Forensic Examiners and the International Association of Document Examiners. Additionally, Meyer has published three articles in peer reviewed journals.

With training from Harvard, Yale, Columbia, and other top-tier institutions, Dr. Daniel Cousin is a dual-boarded fellowship-trained expert in Diagnostic Radiology in active clinical practice who offers same-day (<24 hr) turnarounds on radiology consultations. 

Dr. Cousin has served as a Medical Director in private practice, and also as a Program Director for a residency program where he was responsible for teaching newly minted doctors to be radiologists. He has nearly two decades of experience in the field including both academic and private practices and both clinical and administrative positions. Dr. Cousin is currently the Clinical Director for BayView Radiology in Florida. He is board-certified by both the American Board of Radiology and also by the National Board of Physicians and Surgeons.

Litigation Support - Dr. Cousin is a pioneer in 4D demonstrative evidence, has an impressive lecturing and public speaking experience, presents well before juries, and has testified as an expert over 60 times in the last 4 years. As of 2021, his plaintiff defense split is approximately 50/50. Dr. Cousin offers Independent Medical Reviews (IMEs), Utilization Reviews, Medical Malpractice Reviews, Personal Injury Protection, Bodily Injury Reviews, Second Opinion Imaging Reviews, Re-Reads, and Worker's Compensation Reviews.

Areas of Expertise:

Diagnostic Radiology Gastrointestinal Imaging Back / Neck / Spine Imaging Neuroradiology CT / MRI / PET Scan / PET-CT Oncologic Imaging of Cancer Nuclear Medicine Nuclear Radiology Fluoroscopy Ultrasound X-ray / Radiography Vascular Imaging

Interventional Radiology Angiography and Aneurysm Imaging Mammography Pulmonary Imaging Cardiac Imaging Musculoskeletal and Orthopedic Imaging Genitourinary Imaging Breast Imaging Pediatric Imaging Child Abuse Evaluation Head and Neck Imaging OB / GYN Imaging

Harvard / Yale / Columbia-Trained, Dual-Boarded Radiologist - 24 hr turnaround (646) 303 3125.  

Dr. Cousin can also be found on the following websites:

• Medsurity Experts
• Radsurity 
• www.radiologistconsultant.com

Florida Office:
Andrew Avalon, PE, PSP
Chairman & CEO
8633 Willow Kane Court
Orlando, FL 32835
aavalon@long-intl.com
T: (407) 445-0825     F: (407) 650-3399

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Long International provides expert engineering and construction claims analysis, expert testimony, project management consulting, and insurance claims analysis services. We focus on projects in the following industries: building and construction; gas, gasification, GTL, LNG, and NGL; industrial and manufacturing; mineral and mineral processing; offshore oil and gas; oil sands; pipelines and utilities; power; refineries, petrochemical, and chemical; transportation; and water, wastewater, dams, and marine. We analyze claims, not limited to, disputed change orders, schedule delay, acceleration, time extensions, liquidated damages, loss of productivity, defective specifications, and deficient project management performance.

Richard J. Long, P.E., P.Eng., Founder of Long International, has over 50 years of U.S. and international consulting experience involving construction contract disputes analysis and resolution, arbitration/litigation support and expert testimony, project management, engineering/construction management, cost and schedule control, and process engineering. As an internationally recognized expert in the analysis and resolution of complex construction disputes for over 35 years, Mr. Long has served as the lead expert on over 300 projects having claims ranging in size from US$100,000 to over US$2 billion. He has presented and published numerous articles on claims analysis, entitlement issues, CPM schedule and damages analyses, cumulative impact claims, and claims prevention.

Rod C. Carter, CCP, PSP is President of Long International and has over 20 years of experience in construction project controls, contract disputes and resolution, negotiations, mediation, arbitration support, and expert testimony on scheduling, loss of productivity, and quantum issues.  He has experience in entitlement, schedule, and damages analyses on over 30 construction disputes ranging in value from US$100,000 to US$7 billion, related to oil and gas, oil refinery, LNG, heavy civil, nuclear, environmental, chemical, power, industrial, commercial, and residential construction projects. Mr. Carter specializes in loss of productivity, cumulative impact, and quantum calculations, and had a lead role in assessing damages on more than a dozen major disputes.  In addition, Mr. Carter has developed cost and schedule risk analysis models using Monte Carlo simulations to address the uncertainty of estimates and claims.

Scott M. Francis, P.E., PSP is a Vice President of Long International and has over 20 years of experience in project management, contract disputes analysis and resolution, CPM schedule preparation, execution, and analysis, productivity analysis, contract administration, design engineering, construction management, and government contracting.  He provides schedule development and assurance services, cost estimating, and claims analysis services on projects for both owners and contractors.  Specific responsibilities include CPM development and reviews, CPM schedule delay and acceleration analyses, change order impact analysis, issue identification, correlation of impacts to schedule activities, and productivity evaluations.

Laurie Hoeltzel, PhDc, a Forensic Document Examiner, has studied handwriting examination and apprenticed under some of the leading court-qualified Forensic Document Experts in the United States. She spent 11 years serving her country in the United States Air Force, including three tours of duty in Iraq, while obtaining a Bachelors degree and Document Examination Certificates. Laurie Hoeltzel has been 100% court-qualified and her testimony has always been allowed.

Litigation Support - Ms. Hoeltzel has reviewed numerous signatures and handwritings, examined case documents, and rendered an opinion on cases in AZ, AL, CA, CO, DE, FL, GA, IN, IA, IL, KS, KY, LA, MI, MD, MO, NV, NJ, NM, NY, NC, NY, ND, OH, OK, OR, PA, SC, TN, TX, UT, VT, VA, WV, WI, WA, Washington D.C.; Montreal & Quebec Canada; Freeport & Nassau, Bahamas. She is court-qualified and attorney-recommended. With over 20 years of experience, she is available for depositions and court testimony when necessary, Ms. Hoeltzel offers her expertise to counsel for both plaintiff and defendant NATIONWIDE!

Areas of Specific Training:

• Handwriting Identification
• Signature Comparison
• Distinguishing Forged Signatures Techniques
• Disguised Handwriting
• Altered Numbers
• Anonymous Writing
• Factors that Affect Writing

Disputed Documents or Signatures Analysis on: Wills, checks, contracts, deeds, account ledgers, mortgages, loans, notary disputes, and medical records. Investigation and Analysis for: Questioned signatures, suspect documents, forgeries, identity theft, robo-signing, anonymous letters, bond authentication, alterations, obliterations, erasures, typewritten documents, altered medical records, graffiti, handwritten numbers, suicide notes, and computerized and handwritten documents.

Colorado Office Telephone: 720-724-8077 www.denverhandwritingexpert.com

Texas Office Telephone: 832-827-3052www.houstonhandwritingexpert.com

Arizona Office Telephone: 310-985-2807 www.arizonahandwritingexpert.com

East Florida Office Telephone: 954-745-0752 www.floridahandwritingexpert.com

West Florida Office Telephone: 727-213-5722 www.floridahandwritingexpert.com

George Reis is the president and owner of Imaging Forensics, Inc., and has been providing expert witness services and training in Forensic Image Analysis, Forensic Video Analysis, and Forensic and Technical Photography through Imaging Forensics since 2004. He is Certified in Forensic Photography and Imaging by the International Association for Identification, and is certified in Forensic Video Analysis by the Law Enforcement and Video Services Association (LEVA). He is a member of the editorial review board for the Journal of Forensic Identification.

Litigation Support -  Mr. Reis has testified more than 80 times in depositions and in Federal, State, Military Courts and Internal Court. He has provided training throughout the United States to individuals and agencies including the FBI, Secret Service, US Army Crime Lab; and internationally in England, Hong Kong, Singapore, Qatar, Canada, and Australia.

Mr. Reis worked from 1989 to 2004 at the Newport Beach Police Department in Southern California, as a forensic photographer, image analyst, crime scene investigator, and latent fingerprint examiner. He introduced digital imaging to that agency in 1992, making them one of the first law enforcement agencies in the world to utilize this technology.

• Image Analysis Services: 
  • Image and Video Analysis, Image and Video Authentication, Image and Video Enhancement, Comparative Analysis
• Forensic Photography:  
  • Items of Evidence, Close-up / Macro Photography, Exploded View Photography, Low Altitude Aerial Photography, Crime and Accident Scenes, Eyewitness Perspective, Reverse Projection / Reconstruction
• Training:
  • Over 1,000 police agencies have taken advantage of digital imaging training by Imaging Forensics — either through regional workshops or in-house training. Imaging Forensics offers regional workshops throughout the United States as well as in-house training to meet the needs of your agency.

Mr. Broyles represents 19 years experience in providing expert witness and forensic examination services combined with 32+ years experience in research, design & development of computer software and electronic products to include forensic lab equipment and forensic audio/video/image software.  This combination of experience gives invaluable insights into the forensic processes and application in each unique case or project.  Court Qualified.  Detail CV available on request.    

Areas of Expertise:

Audio, Video and Voice Recordings Voice Identification / Comparison / Elimination Forensic Transcription / Transcriptions Surveillance/Time Lapse Video Processing Authentication, Enhancement, Restoration Noise Reduction /Removal / Improve Intelligibility Video Frame/Field Capture and Printing Signal Recovery, Restoration and Clarification Magnetic Microscopy and Imaging Services Vintage/Obsolete Computer Data Recovery and Conversion, Translation

Digital Image/Photograph Analysis Recording Equipment Analysis and Testing Recording Equipment Restoration Playback Speed Correction Media Repair and Cleaning Services Many Tape and Digital Formats Supported Related Litigation Support Technical Research and/of Forensic Applications Dictaphone Restoration and Transfer Services

Specializing in Recorded Evidence Analysis, Enhancement and Restoration Services of Video, Audio, Image, Sound, Voice, Surveillance and Time Lapse Recordings; both digital and analog; through the use of custom and professional analysis systems.

Providing court qualified expert witness services to assist litigation support, public defenders, law enforcement, attorneys, government, and the general public.  Since 2004.  Local, nationwide and international.

Stated goal is to help you get the most from your recorded evidence.   Call now to get started.

Memberships, Affiliations and Training:

• Audio Engineering Society (AES)
• Institute of Electronics and Electrical Engineers (IEEE)
• Law Enforcement Video and Emergency Services Video Association (LEVA)
• New York Institute for Forensic Audio (NYIFA)
• International Association of Identification Rocky Mtn Division (RMDIAI)

California Main Office: 793A East Foothill Blvd., #200 San Luis Obispo, CA 93405

Global Forensic Services, LLC (GFS) is a Forensic Consulting, Laboratory and Investigative Firm offering over 44 years of experience and training in a wide range of forensic science and private investigation disciplines.

Larry Stewart has personally examined tens of thousands of individual items of evidence from sources such as state, local, and federal agencies (e.g. Federal Bureau of Investigation, Secret Service, Bureau of Alcohol, Tobacco and Firearms, Central Intelligence Agency, and others), and foreign governments. On several occasions he has examined cases involving international disputes between governments. 

Mr. Stewart has testified as an Expert Witness in state, federal and military courts of law, as well as in foreign court systems to include; Austria, Australia, Canada, Germany, Sri Lanka and Thailand. He has also testified at The Hague in the Netherlands and three times as an expert before the U.S. Congress. 

Areas of Expertise Include:

Questioned Documents Crime Scene Evaluation Trace Evidence Ink Analysis Age Determination Authenticity Fraud Investigations

Handwriting Daubert and Cold Case (consultant) Investigations Indented Writing Striations Typewriting Erasures Office Machines Tracing