Stutchman Forensic Lab delivers unmatched mobile device analysis for attorneys and law enforcement agencies nationwide.
Led by retired FBI Supervisory Special Agent Betsy Bartko, our mobile forensics division extracts, preserves, and interprets the digital evidence hidden within smartphones, transforming complex data into courtroom clarity.









Modern cases live and die by what’s inside a phone. Text messages reveal conversations, location data traces movements, and deleted files often hold the most crucial evidence of all.
Stutchman Forensic Lab brings elite mobile forensics expertise to legal professionals who need answers buried deep within iOS and Android devices.
With over two decades of FBI experience and industry-leading certifications, our team turns the overwhelming complexity of smartphone data into clear, defensible evidence that withstands scrutiny in state and federal courts.
Leading our mobile forensics division is Betsy Bartko, whose credentials speak to the caliber of expertise Stutchman Forensic Lab brings to every case.
With 22 years at the FBI including 15 as a certified Digital Forensic Examiner, Betsy spent her career mastering the science of mobile device analysis. She served on the FBI’s Computer Analysis Response Team (CART) and later as Laboratory Director at the FBI’s Northwest Regional Computer Forensics Laboratory, positions that placed her at the forefront of digital forensics technology and methodology.
Betsy holds certifications as a Cellebrite instructor and has completed advanced training through Magnet AXIOM, SANS, and specialized programs in smartphone analysis, mobile repair, JTAG forensics, and artifact extraction. Her extensive courtroom experience includes testimony in both state and federal venues, and she has trained law enforcement agencies internationally in mobile forensic best practices.
This combination of technical mastery, investigative experience, and proven courtroom credibility ensures every mobile forensics case receives the highest level of professional attention.
Leading our mobile forensics division is Betsy Bartko, whose credentials speak to the caliber of expertise Stutchman Forensic Lab brings to every case.
With 22 years at the FBI including 15 as a certified Digital Forensic Examiner, Betsy spent her career mastering the science of mobile device analysis. She served on the FBI’s Computer Analysis Response Team (CART) and later as Laboratory Director at the FBI’s Northwest Regional Computer Forensics Laboratory, positions that placed her at the forefront of digital forensics technology and methodology.
Betsy holds certifications as a Cellebrite instructor and has completed advanced training through Magnet AXIOM, SANS, and specialized programs in smartphone analysis, mobile repair, JTAG forensics, and artifact extraction. Her extensive courtroom experience includes testimony in both state and federal venues, and she has trained law enforcement agencies internationally in mobile forensic best practices.
This combination of technical mastery, investigative experience, and proven courtroom credibility ensures every mobile forensics case receives the highest level of professional attention.

Every smartphone holds thousands of data points, from texts and calls to photos, app activity, and location history. The challenge lies not only in extracting this information but in interpreting it, verifying its accuracy, and presenting it with precision.
Led by Betsy Bartko and our team of mobile forensics specialists, we apply FBI-level expertise and advanced forensic tools to uncover the truth attorneys need. Whether challenging opposing evidence, strengthening a case strategy, or revealing critical facts hidden in digital devices, we turn complex data into clear, defensible insight that stands up in court.

Proper evidence acquisition starts with forensically sound methods that preserve every detail while maintaining chain of custody. Our extraction process captures the complete digital picture:
• Full device imaging for iOS and Android smartphones
• Forensically sound acquisition using Cellebrite
• Preservation of metadata for authentication and timeline reconstruction
• Chain of custody documentation ensuring evidence integrity

What someone tried to hide often matters most. Our forensic specialists recover information others assume is gone forever, revealing the evidence that changes case outcomes:
• Deleted text messages and chat conversations from WhatsApp, Signal, Telegram, and iMessage (if available)
• Removed photos, videos, and audio recordings still residing in device memory (if available)
• App data fragments revealing usage history and deleted content (if available)
• Erased call logs and contact information documenting communication patterns to capture critical details (if available)

Understanding where someone was and when they were there builds the foundation for countless cases. We piece together comprehensive timelines from the digital breadcrumbs smartphones leave behind:
• GPS and geolocation tracking pinpointing device movements
• Cell tower data analysis establishing presence in specific areas
• App usage patterns revealing activity during critical timeframes
• Communication timeline mapping connecting calls, texts, and messages chronologically for admissibility

Evidence only matters if it holds up under challenge. Our forensic examination validates digital evidence and exposes manipulation attempts:
• Metadata verification confirming file creation dates and origins
• Tampering detection identifying alterations or fabrications
• Screenshot authentication verifying social media and messaging evidence
• Warrant return validation ensuring extracted data matches court orders

Technical findings need clear explanation in court. Our experts translate complex mobile forensics into testimony that judges and juries understand:
• State and Federal Court testimony
• Deposition preparation and support
• Technical consultation for cross examination
• Clear visualization of complex digital evidence

Stutchman Forensic Lab adheres to the highest standards of confidentiality, compliance and professionalism with every case.
Raw data tells stories, but those stories need translation. Stutchman Forensic Lab excels at transforming extracted mobile evidence into visual exhibits that resonate in court. We create timelines showing communication patterns, maps displaying location data, and charts illustrating app usage that help attorneys present complex technical findings with immediate impact. Whether clarifying who texted whom and when, demonstrating that a device was present at a specific location, or proving that critical messages were deleted, our demonstrative evidence cuts through technical complexity and delivers courtroom clarity.
While mobile forensics expertise remains consistent regardless of location, our reach extends across the United States and Canada.
Since 1992, Stutchman Forensic Lab has served legal professionals nationwide with meticulous digital analysis.
From criminal defense cases requiring deleted message recovery to civil litigation hinging on location data, corporate investigations involving encrypted communications to law enforcement cases demanding comprehensive device imaging, we deliver the same rigorous standards and technical excellence wherever justice requires clarity.
Your case receives expert attention whether it unfolds in local courts or spans multiple jurisdictions.
Chattanooga TN Forensic Office
Detroit Forensic Office
Seattle Forensic Office
Chicago Forensic Office
Atlanta Forensic Lab
Dallas Forensic Lab
Charlotte Forensic Lab
Orlando Forensic Lab
Napa CA Forensic Office
New York Forensic Lab
Los Angeles Forensic Lab
San Diego Forensic Lab
San Francisco Forensic Lab
Sacramento Forensic Lab
Denver Forensic Lab
Mobile device forensics demands more than just software and extraction tools. It requires deep understanding of how smartphones store data, how apps create artifacts, and how deleted information can be recovered without compromising integrity. Betsy Bartko brings precisely this expertise, honed through 15 years analyzing mobile devices for the FBI’s most critical investigations. That same level of technical excellence now serves attorneys and law enforcement agencies who need mobile evidence they can trust and defend in court.
We invest in the best forensic technology available because your cases deserve nothing less. Betsy’s certification as a Cellebrite instructor means we’re not just using these tools but teaching others how to use them properly. This depth of knowledge translates into more comprehensive extractions, better data recovery, and stronger evidence that opposing experts struggle to challenge.
Technical excellence means little if it doesn’t translate effectively in court. Our mobile forensics experts, led by Betsy’s extensive testimony experience, present findings with the clarity and confidence that wins cases. We understand what judges need to hear regarding admissibility, what juries need to see to understand complex data, and what opposing counsel will challenge during cross examination. This courtroom awareness shapes every aspect of our analysis, ensuring mobile evidence becomes compelling proof rather than technical confusion.
“I have known Mr. Stutchman on a professional basis for over eight years. Mr. Stutchman is a very well known and well-respected investigator and forensic consultant. . Over the years I have had the opportunity to discuss Mr. Stutchman’s competence and integrity with local attorneys. These attorneys all speak in glowing terms of Mr. Stutchman’s competence and high morals. . I found Mr. Stutchman to be extremely well qualified in his area of expertise.”
Deputy Public Defender, Stanislaus County, CA
“I wanted to let you know how helpful the work was that your Company did on our case. The District Attorney dismissed the case this morning based on the fact that the video surveillance as enhanced by Stephen Buller showed that my client was not the person in the video. Thanks for your assistance!“
Senior Deputy District Attorney, County of Santa Barbara
“I wish to take this opportunity to thank you for the excellent work you did in the case of People v. Malinda Jean Jones. Your business did an excellent job with the videotape. This proved to be of invaluable assistance when the jury watched the videotape. Additionally, when you testified during the jury trial, the jury was impressed with your presentation. The work you did in this matter really made a difference. Thank you for your contribution to the success of this important case.”
Lawyer, San Francisco, CA
“The undersigned has been acquainted with and has utilized the services of Mr. Stutchman for approximately the past seven years. I unreservedly recommend Mr. Stutchman for his expertise, devotion to task and quality of work. In an attempted murder case in 1994, his graphics, aerial photographs, enhancements of video and audio tapes were state-of-the-art. He testified as an expert witness for us in these areas. Since that time he has testified on numerous occasions as an expert. In short, I heartily recommend Mr. Stutchman to anyone needing his services and will be happy to speak to anyone concerning his qualifications.”
Ret. Police Officer, Sr. Special Investigator, Napa, CA
“As a senior special investigator in one of the top insurance companies in America, my unit frequently procures the services of Stutchman Forensic Audio and Video Laboratory to clarify and analyze audio and videotapes…We look to Mr. Stutchman to provide the unbiased investigation into our audio and video forensic needs…I know Mr. Stutchman to be honest, hardworking and dedicated to his craft. His reputation is impeccable.”
Attorney at Law, Napa, CA
“Having practiced criminal law in the courts throughout California for over 30 years, I believe I know an excellent professional when I see one. Gregg Stutchman is one of those rare professionals who is not only superbly qualified, who keeps himself on the cutting edge of technological development, but also one who takes a direct personal interest in his client’s cases. He is prompt and efficient in his work, and will go the ‘extra mile’ that often makes the difference in the successful resolution of complex cases.”
District Attorney Investigator, Santa Rosa, CA
“Since my first meeting with Mr. Stutchman, I and other investigators in our office have used him to examine both audio and video evidence for purposes of criminal prosecutions in other cases. On all occasions we have been exceptionally pleased with Mr. Stutchman’s work and continue to use his services. I know I can count on him to provide fair and competent examinations of audio and video evidence.”
Attorney at Law, San Jose, CA
“I wanted to send you a somewhat belated thanks for the work you performed on behalf of my client. The enhanced and slowed tapes were the straw that finally broke the rather sturdy back of the prosecutor. All eleven robbery counts were dismissed on the eve of trial, and my client and the co-defendant were released after spending nine months in jail for a crime that they didn’t commit. On behalf my client and myself, I send you a heartfelt thanks.”
Investigator, Ukiah, CA
“I have personally worked with Mr. Stutchman when he was hired by our office to do both audio and video work…His work product is excellent… I have always known him to be both honest and professional.”
Chief, Napa Valley, CA
“Mr. Stutchman is known widely in the criminal justice community as a person who conducts himself and the operations of his laboratory according to a very high level of ethical standards. The outcomes of his work are a testament to this fact and a reflection of his dedication.”
Assistant Public Defender, Georgia Public Defender Council
"Thank you for the video enhancement. It will be very helpful to my client’s case. I will make sure to let the other attorney's in the office know about the quality of the work as well as the great turnaround time. Thanks again."
Partner, Jacobsen & McElroy PC
Testimonial for Civil Attorney, this can also go under the Insurance landing page as well:"Over the past decade I have retained Stutchman Forensic Lab when video evidence becomes a material issue in my litigated cases. I am always impressed with their response time, work product, and professionalism!"
she/her/hers, Certified Criminal Law Specialist
"I have worked with Steve Buller at Stutchman on multiple homicide cases in the last ten years, always with excellent results. Steve is always clear, responsive, available, patient when I ask him to repeat an explanation, no drama, and always stay within the allotted budget. He stands out from many other experts because of his down-to-earth style of just getting the work done without delays or excuses and then helping me understand what he did and how he did it. Steve is great at enhancing video and audio recordings, and he recently deconstructed a fairly complex video compilation created by law enforcement. He was able to tell me what they got right and what they got wrong-excellent material for cross examination. I will always return to Steve for forensic help."
When critical evidence lives inside a smartphone, expertise makes all the difference. Stutchman Forensic Lab combines FBI-level technical capability with the courtroom experience attorneys need to present mobile evidence effectively. Our commitment to forensic integrity, comprehensive analysis, and clear communication has made us the trusted choice for legal professionals who demand reliable answers from mobile devices. Contact us today to discover how court-ready mobile forensics can transform your case and reveal the digital truth that matters most.
Eric R. Uldall
Superior Court Judge – Ret.