A secret mission

There once was a janitor in the CIA building. One day as he's mopping the floor, he over hears a couple of new agents talking about a mission. He walks up and asks them if he could get in on it. After a couple of minutes of discussion they decide its alright. The two agents, the janitor, and a senior agent climb into a van. The senior agent explains that there will be a test. They go to the first agents house and stop out front. The senior agent hands him a suppressed pistol and tells him to go on the mission he must kill his wife to prove he can handle anything the mission might throw at him. He takes the pistol and walks inside, after a few minutes he comes out sobbing and hands the pistol back, saying he can't do it. They leave him and head to the next agents house, same drill. He too comes out of the house sobbing, and hands the pistol back. So the senior agent and the janitor head to the janitors house. The janitor grabs the pistol and walks inside. After a few minutes, suppressed pistol shots ring out, followed by some silence and then a lot of loud banging and crashing around. Everything falls silent and the janitor walks out of the house winded and covered in blood. As he gets in the van he throws the empty pistol on the dash and exclaims, some asshole loaded the damn thing with blanks, I had to beat her to death with a chair!!!

EDIT: spelling\context