The Knower of All Things passes along an interesting tidbit about internal investigations conducted by the Portland Police Bureau. These include interviews with witnesses, including Portland police officers who are witnesses. Those interviews are taped and transcribed.
The Knower says that every transcript he's read, the interviewer (himself or herself a police officer) begins by asking a question about the investigation. The police officer being interviewed says that he or she refuses to answer. The interviewer then says that the police officer must answer the question or risk being fired. The interviewee then answers, and the interview proceeds. This little ritual dance happened at the start of each interview.
The Knower concedes that he last read transcripts several years ago and doesn't know if Portland's finest still refuse to assist law enforcement unless they're first threatened with being fired. I'm guessing that there's some historical reason for officers to insist on being forced to answer questions, but I don't know what it is. Perhaps it will come out in the Chasse family's lawsuit.