Sheriff’s deputies in southeast Wisconsin say they know the cold case killer of an 18-year-old woman.
Traci Hammerberg was found beaten to death in the driveway of a Town of Grafton home, nearly 35 years ago.
Ozaukee County investigators say Phillip Cross was 21 at the time, and he died of a drug overdose in 2012. They used DNA evidence and forensic genealogy to link Cross to the crime.
Hammerberg had been at a party the night she was last seen alive. Deputies say Cross left work at a factory that night.
