Remember the 
incident a few days ago where LA sheriff deputies blew themselves up with a grenade they seized? Well
Luna said authorities X-rayed special enforcement bureau vehicles, searched all around the blast area and examined office spaces and even the gym and haven’t found [the second grenade].
“You get the drift. We have looked at everything out there that we possibly could,” he said, adding that no one from the public has had access to the area.
“Right now there’s a second grenade, that we’re not 100% sure where it’s at,” Luna said.
Los Angeles’ finest minds.
Chekhov’s Gun is a narrative principle emphasizing that every element in a story be necessary, while irrelevant elements should be removed. For example, if a gun features in a story, there must be a reason for it, such as being fired at some later point.
“there was a really big gun on the wall. it looked sick. it could have been an old timey rifle or a shotgun or something, i didn’t get a great look and i don’t know a lot about guns. but it was really cool” and then it just never gets mentioned again.