San Francisco police on Thursday began investigating a threat against officers called in overnight, just days after a man was arrested for threatening the police chief on social media by posting a photo of him alongside a guillotine.
An anonymous caller phoned the station late Wednesday night, offering a $15,000 cash reward for anyone who kills a San Francisco police officer.
No arrest has been made in the case, and no information about the suspect was immediately available.
"Actually we do receive threats here and there," said Officer Giselle Talkoff, a department spokeswoman. "We take them all very seriously, so it's nothing new to us."
The threat comes days after another case in which 60-year-old Donald Eric Hoganson was arrested for allegedly making criminal threats against Acting Chief Toney Chaplin on Twitter. The July 16 tweet called for Chaplin's head, and the feed contains white supremacy messages.
Investigators discovered the alleged threats on Saturday and arrested Hoganson on Monday in the 2500 block of Ortega Street in the city's Sunset District.
Jim Dudley, a retired deputy with SFPD and a lecturer with San Francisco State University's criminal justice department, said these times call on officers to show more situational awareness - and that the department is making sure of that.
"If there are death threats or threats against police officers, you better believe that's being discussed at roll call meetings, the beginning of shifts, the beginning of watches," Dudley said.
The nation has been on edge this summer as five police officers in Dallas were killed by a sniper and three more officers were killed in Baton Rouge last week. Much of the national angst is stemming from the anger people feel over what they view is the unfair killings of black men who are taken in as suspects by police.
Anyone with information about the latest threat should call SFPD at 415-837-7395.