The Zodiac Killer is a still-unknown serial murderer who killed five people and injured two others in the Bay area in the late 1960s.READ MORE: Man Approaches, Threatens Teenage Girls in Berkeley; Police Seek Surveillance Footage
The killer left a series of taunting notes to Bay Area media outlets, and Philadelphia police say copies of one such letter were distributed on Halloween.READ MORE: San Mateo County Supervisors Approve New District Maps
Police Capt. George Kappe tells WTXF-TV that the there are no threats that lead police to believe people might be in danger.
© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.MORE NEWS: COVID: Contra Costa Supes Tell Health Department To Crack Down On Establishments Defying Health Order