Robert Slivoski, 68, was found dead under suspicious circumstances on December 15, 2011, in the Polk Gulch area of San Francisco. Authorities classified the death as a homicide after initial reports noted signs of foul play. Limited evidence and a lack of witnesses meant the investigation went cold, and the case is listed among the San Francisco Police Department’s unsolved homicides.

The SFPD Cold Case Unit continues to handle the file, using both traditional investigative work and forensic tools such as DNA analysis, and it collaborates with community members and other agencies. Financial rewards between $50,000 and $250,000 have been offered for tips that could lead to arrest and prosecution. Does anyone who lived or worked near Polk Gulch in December 2011 remember anything that might help investigators?