Our mind sometimes plays tricks on us and Tells us stories. We begin to believe that Those stories are true and then that story Gets replayed over and over in our head.
Great, so security thinks they're Watching reality television on a really low Quality screen all day. The police have no confidence that they Can solve crimes and the only redeeming Quality about the whole situation is that I know it was a human being.
That's because glutamate excites the neurons like a 14 year old that just found his uncle's stash of...er...umm...artistic analog renditions of 1970-1980's women.