<p>SAN FRANCISCO - DECEMBER 26: A man takes a breathalizer test at a sobriety checkpoint December 26, 2004 in San Francisco, California. The California Highway Patrol reported a total of 1,481 driving under the influence arrests since the Dec. 17, the start of the AVOID regional campaign against drunken driving. AVOID, a regional force of 125 police departments in the San Francisco Bay Area, runs its annual ANTI-DUI campaign from December 17th through January 2nd. (Photo by Justin Sullivan/Getty Images)</p>
SAN FRANCISCO (AP) — San Francisco police are investigating a Twitter threat against the department's acting police chief.
Officer Carlos Manfredi said Tuesday investigators were gathering evidence and conducting interviews, as they prepared to present a case to prosecutors.
According to the San Francisco Chronicle, the tweet posted Saturday called for beheading Chief Toney Chaplin and included a photo of the chief beside a guillotine.
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