When I worked on a student newspaper in Montreal, a photographer of ours was once detained by Metro (subway) cops and beaten in a back room. I did the followup

When I worked on a student newspaper in Montreal, a photographer of ours was once detained by Metro (subway) cops and beaten in a back room. I did the followup and a cop read the police report to me over the phone. It detailed how the photographer had aggressively interfered with the police in the performance of their duties, quoting the French profanities he had uttered. Problem: the photographer was a unilingual English-speaker from Ontario. When they told me that, I got a little too excited about getting them to give me these exact quotes from the report. The police officer suddenly said he'd call me back. Fifteen minutes later, he called me back, opening with "aaah, actually we don't know exactly what he said." This isn't even the most interesting case of cops lying that I know of, but you always remember your first.