CHICAGO—A Democratic senator said the U.S. Justice Department needs to look into whether the algorithm-powered police technologies it funds contribute to racial bias in law enforcement and lead to wrongful arrests. Sen. Ron Wyden, an Oregon Democrat, was responding to an investigation by The Associated Press published Thursday about the possibility of bias in courtroom evidence produced by an algorithm-powered gunshot detection technology called ShotSpotter. The system, which can be funded by Justice Department grants, is used by law enforcement in more than 110 U.S. communities to detect gunfire and respond to crime scenes faster. “While there continues to be a national debate on policing in America, it’s become increasingly clear that algorithms and technologies used during investigations, like ShotSpotter, can further racial biases and increase the potential for sending innocent people to prison,” Wyden said. Chicago prosecutors relied on audio evidence picked up by ShotSpotter sensors to charge 65-year-old …