WISCONSIN 1984 Cold Case Solved — Police Tested 400 Men. The Real Killer Was Never on Their List

WISCONSIN 1984 Cold Case Solved — Police Tested 400 Men. The Real Killer Was Never on Their List In December 1984, 18-year-old Traci Lynn Hammerberg left a party in Grafton, Wisconsin, and began walking home through the freezing winter night. Hours later, her body was discovered on a snow-covered driveway in Ozaukee County. She had been brutally assaulted and murdered, leaving her family devastated and an entire community searching for answers. For nearly 35 years, investigators pursued countless leads, questioned witnesses, and collected DNA samples from more than 400 men. Yet every test led to another dead end. The killer remained unidentified, and the case became one of Wisconsin's most haunting unsolved murders. Everything changed in 2019 when investigators turned to forensic genetic genealogy. Using DNA evidence preserved from the original crime scene, specialists uncovered a family connection that eventually led them to Philip J. Cross, a man who had never appeared on the investigators' suspect list. But the discovery came with a heartbreaking twist: Cross had died in 2012, seven years before investigators identified him through DNA. This episode of Silent Evidence explores the disturbing circumstances surrounding Traci Hammerberg's murder, the decades-long investigation, the breakthrough that finally revealed the suspected killer's identity, and the painful reality that justice arrived too late for a courtroom trial. Subscribe to Silent Evidence for more unforgettable cold cases, shocking forensic discoveries, and stories of victims whose families never stopped searching for the truth. 📚 REFERENCES & FURTHER READING Ozaukee County Sheriff's Office — Press Conference on the Hammerberg Case (October 22, 2019): http s://www.facebook.com/OzaukeeCount... NBC News — 35-Year-Old Cold Case Murder in Wisconsin Solved Using DNA and Genealogy: http s://www.nbcnews.com/news/us-news/... ABC News — Man Who Allegedly Raped, Strangled Teen in 1984 Identified with Genetic Genealogy: http s://abcnews.go.com/US/man-alleged... CBS 58 Milwaukee — Forensic Genealogy Solves 1984 Cold Case Murder of Traci Hammerberg: http s://www.cbs58.com/news/sheriffs-o... FOX6 Milwaukee (Bryan Polcyn) — Cold Case Solved: Killer in 1984 Ozaukee County Homicide ID'd Through Genetic Genealogy: http s://www.fox6now.com/news/cold-cas... FOX6 Milwaukee — Public DNA Databases Are Solving Violent Crimes: http s://www.fox6now.com/news/the-pote... TMJ4 News — 35-Year-Old Cold Case Solved with Help from Genealogy Databases: http s://www.tmj4.com/news/local-news/... WISN 12 — Forensic Genetic Genealogy Leads Authorities to Suspect in 1984 Cold Case: http s://www.wisn.com/article/ozaukee-... Wisconsin Public Radio (WPR) — Forensic Genealogy Solves 1984 Ozaukee County Cold Case: http s://www.wpr.org/justice/forensic-... Milwaukee Journal Sentinel (Jeff Rumage) — After Nearly 35 Years, Police Identify the Man They Say Murdered Traci Hammerberg: http s://www.jsonline.com/story/commun... Ozaukee Press — The Traci Hammerberg Murder: DNA Shows Port Man Killed Woman in 1984: http s://www.ozaukeepress.com/content/... Ozaukee Press (Dan Benson) — For Detective Working on Cold Case, Murder Is Impossible to Forget: http s://www.ozaukeepress.com/content/... Oxygen True Crime — Traci Hammerberg Cold Case Solved: Philip Cross Identified as Killer: http s://www.oxygen.com/crime-news/tra... Associated Press (via Wausau Pilot & Review) — Authorities Identify Suspect in 1984 Murder of Traci Hammerberg: http s://wausaupilotandreview.com/tag/... 📰 HISTORICAL NEWSPAPERS (via Newspapers.com) Wisconsin State Journal — "Body of Saukville Woman Found" (December 17, 1984) The Journal Times — "Search Continues for Clues in Slaying" (December 17, 1984) The Winona Daily News — "Murder Probe Continues" (December 18, 1984) The Capital Times — "Slain Woman Was Friend of Another Murdered Last Year" (July 22, 1985) Wisconsin State Journal — "Port Washington Police Eye Murder Link" (July 23, 1985) 🎬 TELEVISION Forensic Files II, Season 2 Episode 13 — "Grave Justice" (HLN, August 22, 2021) Available on HBO Max, discovery+, and Prime Video 🎙️ PODCASTS The Generation Why Podcast — "Murder of Traci Hammerberg Solved After 35 Years" True Crime Archives (Steven Fangel & Hannah Shollin) — "35-Year-Old DNA Solves the Case" FOX6 Open Record (Bryan Polcyn, Jenna Sachs, Amanda St. Hilaire) — "Investigators Never Gave Up"