David Parra, 38, was killed in San Francisco on June 25, 2007. The San Francisco Police Department lists his death as an unsolved homicide and has categorized the case as cold.

Authorities have said rewards may be offered for information leading to an arrest or prosecution, and the department maintains avenues for reporting tips on unsolved cases. The case underscores the challenge of homicides that go cold when there are few witnesses or limited evidence.

If anyone has information about David Parra’s death or remembers anything from June 2007 in San Francisco, please contact the San Francisco Police Department’s tip line.