Pittsburgh's police chief has closed his Twitter account and asked for a city investigation to determine if he broke regulations after he was photographed on New Year's Eve holding a sign saying, "I resolve to challenge racism @ work" with the hash tag "end white silence."
A city spokeswoman says Chief Cameron McLay made the decisions after a meeting Wednesday with Fraternal Order of Police President Howard McQuillan.
McQuillan has said the sign painted city police as racists and violated a policy governing police social media participation.
Mayor Bill Peduto praised McLay for recognizing that racism exists and acknowledging there's work to be done restoring trust between the city's police and the black community.
A protester brought the sign to the city's First Night celebration. McLay was hired in September.
