From Michigan State Police road patrol and major crime scenes to laboratory examination, teaching and Speckin Forensics.
In a laboratory scene from Forensic Files, Michael J. Sinke studies a shoe impression developed on a piece of broken glass. His explanation is brief and measured: investigators have found something valuable.
“We have some really good footwear impressions here.” — Michael J. Sinke
That understated reaction introduces Michael Sinke as a forensic expert who keeps the focus on the evidence. Good forensic work is often less about one spectacular discovery than knowing when a small or incomplete detail deserves closer examination.
According to Sinke’s published Speckin Forensics profile, he served as a Michigan State Police trooper, worked for more than two decades in the Michigan State Police Crime Lab and joined Speckin Forensic Laboratories in 1997. His work spans latent prints, crime-scene reconstruction and forensic document analysis—three fields connected by the same central question: What does the physical evidence actually support?
From the road to the crime laboratory
Sinke’s forensic career did not begin behind a laboratory bench. After earning a Bachelor of Science in Criminal Justice from Michigan State University in 1972, he completed trooper recruit school and served on road patrol with the Michigan State Police.
That early experience included investigating criminal activity, responding to scenes and testifying in court. It gave him a practical view of how evidence is first encountered: not as a clean exhibit in a controlled room, but as one part of a larger event involving people, movement, time pressure and the risk of loss or contamination.
In 1976, Sinke transferred to the Michigan State Police Crime Lab. His published profile describes a mandatory three-year training program in latent-print processing and identification, along with crime-scene evidence collection and preservation under court-qualified forensic specialists.
His profile reports work on more than 7,600 cases and assistance with approximately 200 major crime scenes. Those numbers show scale, but their real value is the range of conditions they represent. Surfaces differ. Scenes are disturbed. Prints are partial. Records are incomplete. Each matter demands a disciplined assessment of what can be recovered, compared and explained.
Three specialties, one evidence-first approach
At Speckin Forensics, Sinke’s work brings together three related disciplines.
Latent prints
Latent-print examination begins with recognizing that useful ridge detail may not be visible to the unaided eye. Development methods depend on the surface and condition of the evidence. Once a print is preserved, the examiner must evaluate the clarity, quantity and reliability of the available detail before making a comparison. Sinke’s profile reports that he assisted in processing approximately 200 major crime scenes and served on the committee involved in establishing the Michigan State Police Automated Fingerprint Identification System.
The important point is restraint. Not every mark is suitable for comparison, and an incomplete print does not automatically become useless. The conclusion must remain proportional to the quality of the evidence.
Crime-scene reconstruction
Crime-scene reconstruction asks how the documented evidence fits together. Photographs, diagrams, reports, physical damage, biological evidence, impressions and the location of objects may help evaluate possible movements or sequences of events.
Reconstruction is the organized testing of explanations against documented facts. Sinke’s road-patrol experience and reported involvement with approximately 200 major scenes give him perspective on the full path evidence takes—from its original location to its later presentation in a report or courtroom.
Forensic document analysis
Documents are also physical evidence. Handwriting, signatures, alterations, additions and indented impressions can raise questions that require careful examination of originals and appropriate comparison material.
Sinke completed additional training in forensic document analysis at Speckin Forensic Laboratories under Leonard Speckin, Robert Kullman and Erich Speckin. He also coauthored Speckin research on indented impressions produced by traced forgery. His published profile lists court qualification in latent prints, document analysis and crime-scene reconstruction.
What connects these specialties is not a particular instrument. It is the habit of looking closely, documenting observations and separating what is demonstrable from what is merely assumed.
What Forensic Files reveals about how Sinke thinks
The 2006 Forensic Files episode “Sole Searching” offers a clear example of that approach. The program examines the murder of Audrey Nichols during a break-in at her Lansing home. With no eyewitness and little obvious evidence, investigators focused on the intruder’s likely path from the forced rear entrance to the bathroom.
Sinke explains the practical logic in one direct sentence:
“Everything in between has to be processed.” — Michael J. Sinke
It is a memorable moment because he reduces a complicated scene to a method anyone can understand. Establish the likely route. Protect it. Examine it systematically. Do not decide in advance which surface will matter.
Investigators subsequently developed the heel area of an athletic shoe on patterned linoleum and the toe area of the right shoe on broken door glass. Neither was a complete outsole impression.
Sinke addresses that limitation directly:
“Most of the prints you see are partial prints.” — Michael J. Sinke
On camera, Sinke makes imperfect evidence understandable without presenting it as perfect. Scene traffic, movement, the receiving surface and later damage can all affect what remains. The task is to evaluate reliable detail within those limits.
The episode’s footwear comparisons were performed by trace evidence analyst Amy Michaud. She excluded an apparently promising suspect’s shoes because their size and features did not correspond. That result matters here: it shows how physical evidence can reject an attractive theory. A later lead produced a different pair of shoes that the program reports as corresponding with the preserved impressions; the suspect subsequently confessed.
The episode identifies Amy Michaud as the analyst who performed the footwear comparisons. Sinke’s on-camera role is explanatory: he shows viewers how investigators follow a scene, preserve incomplete evidence and recognize when a fragment warrants further work.
The expert who also taught the next generation
Technical ability is only part of an examiner’s value. Forensic findings must also be communicated to investigators, attorneys and fact-finders who may not share the examiner’s training.
Sinke’s published professional record includes nearly two decades teaching new state police recruits and crime-scene investigators at the Michigan State Police Academy. It also lists guest lectures at Lansing Community College and Michigan State University.
His profile also lists service on the Pre-ASCLD inspection team for the New York City Crime Laboratory and participation in an investigative review of the Houston Police Department Crime Laboratory’s questioned-document work.
Those roles require a different kind of expertise. The examiner must be able to evaluate methods, recognize weaknesses, explain standards and help other professionals understand why a conclusion is—or is not—supported.
That same communication ability is visible in Sinke’s appearances involving casework on Forensic Files, Unsolved Mysteries and 48 Hours. On camera, his concise explanations keep the evidence at the center.
What experienced forensic review can give an attorney
Attorneys rarely receive a case as a perfectly organized scientific package. They may receive scene photographs without context, a short laboratory conclusion, incomplete comparison materials or reports written in terminology that is difficult to evaluate.
An experienced forensic review may be useful when:
- A latent-print identification or exclusion is disputed.
- Scene processing, documentation or preservation appears incomplete.
- A reconstruction depends on movement, sequence or the location of objects.
- A document may contain alterations, additions, disputed handwriting or indented impressions.
- Counsel needs an independent assessment before a deposition, evidentiary motion, mediation or trial.
Depending on the issue, the review may require original scene photographs, videos, diagrams, measurements, latent-print lift cards, laboratory notes, chain-of-custody records, comparison exemplars, questioned documents and prior expert reports. Those materials help counsel ask better questions:
- Was the evidence collected and preserved appropriately?
- Are the original photographs, lift cards, notes and comparison materials available?
- Is the evidence suitable for the conclusion reported?
- Were meaningful differences or alternative explanations addressed?
- Does the opinion remain within the examiner’s discipline and the limitations of the record?
- Would additional examination, testing or reconstruction be useful?
The answer will not always support the position of the party requesting the review. That independence is the point. In “Sole Searching,” excluding the first pair of shoes prevented a compelling coincidence from being mistaken for a supported forensic conclusion.
Calm, evidence-led communication
Michael Sinke’s published career reaches from road patrol to major crime scenes, laboratory examination, professional training, court qualification and television appearances. Across those settings, the consistent quality is straightforward communication.
He follows the path. He expects evidence to be incomplete. He notices when a fragment is worth more attention. And he explains why without making the science sound magical.
That is what makes his appearance on Forensic Files memorable—and what makes his broader experience valuable to the attorneys and investigators who work with Speckin Forensics.
If your matter involves latent prints, questioned documents or crime-scene reconstruction, contact Speckin Forensics with the jurisdiction or forum, civil or criminal case type, next deadline, disputed forensic issue, evidence currently available and any existing laboratory or expert reports. Before shipping original evidence or transmitting sensitive files, confirm that the laboratory has completed its conflict and scope review, then ask for its current handling instructions. No particular conclusion is promised; the evidence leads the review.
Watch “Sole Searching” through FilmRise. The episode originally aired in 2006, and its numbering varies by platform. Michael Sinke is credited as the latent forensic specialist. Amy Michaud is credited as the trace evidence analyst who performed the footwear comparisons.