No Body, No Jury: Kosowski Cross-Examines the DNA Analyst Over His Own Test Result

The state's own DNA analyst walks the court through an astronomically strong match tying evidence in the case to Steven Cozzi, then Tomasz Kosowski, representing himself, spends nearly an hour cross-examining that same analyst about the one result that comes back weak: his own. A plastic surgeon sued for money, stopped defending the case, and was weeks from losing it when the lawyer on the other side disappeared. No body has ever been found. Tomasz Kosowski has fired every lawyer he had, given up his right to a jury, and now defends himself against the death penalty. Steven Cozzi is the lawyer who vanished, and this witness is the DNA analyst whose lab work ties physical evidence to that disappearance. Chad Summerfield spent 17 years as the DNA technical leader at the Pinellas County Forensic Laboratory, writing the policies and procedures the lab still runs on, before moving to Florida International University's National Forensic Science Technology Center, where he now trains crime labs nationwide. He walks the court through the science first: how a reference sample, a toothbrush, a swab from the inside of the cheek, is compared against evidence collected in the case, and how a mixture, more than one person's DNA on a single item, gets interpreted and reported. Two reference samples anchor his testimony: a toothbrush represented to be Cozzi's own, submitted while Cozzi was still missing, and a cheek swab from Michael Montgomery, Cozzi's husband. Against those references, Summerfield testifies that a swab from inside the tailgate of the Toyota Tundra connected to this case returns a DNA profile approximately 380 septillion times more likely to have come from Cozzi than from an unrelated, unknown contributor, a number so large he has to explain the scale of it to the court himself: millions, billions, trillions, quadrillions, quintillions, sextillions, septillions. Not every item comes back that strong. A stained paper towel, tested for both Cozzi's DNA and, separately, for a sample tied to Kosowski, produces a far lower likelihood ratio for Kosowski's side of the mixture, a result his own lab reports not as inconclusive but with a specific, standardized qualifier: limited support. On cross-examination, representing himself, Kosowski walks Summerfield through the math on that one item, page by page, setting his own low number beside Cozzi's own result on the same piece of evidence and pressing the analyst on what a number that close to one actually proves. He closes by asking directly whether the analyst would say his DNA is on that paper towel "without a shadow of a doubt." Summerfield's answer: "I would not say that. I would say it provides very strong support for." Kosowski is presumed innocent, and Judge Bulone alone will decide the case. --- KEY MOMENTS 0:02:01 - "My name is Chad Summerfield": 17 years as the Pinellas lab's DNA technical leader, now training crime labs nationwide 0:25:55 - The two reference samples that anchor the case: Cozzi's own toothbrush and Montgomery's cheek swab 0:31:10 - "Approximately 380 septillion times more likely": the tailgate swab tied to Cozzi 1:32:42 - Representing himself, Kosowski walks the analyst through his own low result, page by page 1:39:24 - "Without a shadow of a doubt": the analyst's answer to Kosowski's own question CASE BACKGROUND REPORT: https://justiceisaprocess.com/fl-v-ko... Complete case overview including the charges, the timeline, the key players, and the legal questions this trial raises. State of Florida v. Tomasz Kosowski. Pinellas County Circuit Court in Clearwater, Judge Joseph Bulone presiding. Kosowski faces one count of first-degree murder in the death of Steven Cozzi, and prosecutors are seeking the death penalty even though no body has ever been found. Kosowski has waived his right to a jury for both the guilt and penalty phases, so Judge Bulone alone will decide the case, and he is representing himself pro se. Tomasz Kosowski is presumed innocent unless and until proven guilty. LATEST ARTICLE: https://justiceisaprocess.com/desk-20... PLAYLISTS AND RESOURCES Website: https://justiceisaprocess.com/coverag... Full Trial Live Broadcasts:    • Florida v. Tomasz Kosowski: Full Trial Liv...   No Breaks Edition:    • Florida v. Tomasz Kosowski: No Breaks Edition   Trial Analysis Podcast:    • Florida v. Tomasz Kosowski: Case Story Tri...   Key Moments and Testimony:    • Florida v. Tomasz Kosowski: Key Moments & ...   Subscribe for Daily Coverage:    / @justiceisaprocess   FAIR USE AND EDUCATIONAL PURPOSE This content is produced under Fair Use (17 U.S.C. 107) for news reporting, criticism, and educational purposes. We provide transformative commentary on public court proceedings, advancing public understanding of the judicial process through timestamps, analysis, and educational context. #JusticeIsAProcess #TomaszKosowski #StevenCozzi