And some detectives continue to grumble about policies the department adopted in 2014, in collaboration with the American Civil Liberties Union and the Pennsylvania Innocence Project, which requires interrogations in the homicide unit to be video-recorded, and for detectives to remind witnesses and even potential suspects who are brought in for questioning that they can leave at any time. "We have a hard enough time as it is getting people to come in and talk to us," one investigator said at the time.