In the movie Nowhere Alaska (about 68'52" in), the policeman says something about murder in concert. It sounds like a legal term so I googled it. No relevant hit as far I could see - just a bunch of links on murders during a concert and some band called murder performing at a concert.
Do you know what murder in concert is?
I sense that there's something to that term in formally legal terms but can't find anything. Am I correct or sorowly mistaken?