The story happened in the restroom of a bar.
A drunken man (let's call him guy number1) entered the restroom to discharge those binge drinking he just had earlier in the bar. As he was taking a leak, some rustling noises appeared from the back. The drunken man sprung around and saw what appeared to be a janitor mopping the floor.
"Is there something wrong sir?" the janitor said.
"If you're going to mop the floor, keep that damn noise down. I can't go when there're noises." the drunkard said.
"Not a problem sir."
The drunken man finished his business and left the restroom.
Another man (guy number2) entered the restroom shortly after the drunkard left. He too noticed that there're some rustling noises on his back while he's taking a squirt. He looked about and saw the same janitor mopping the floor.
The janitor asked the same question.
"Is there something wrong sir?"
"No. None at all. I'll finish it as quick as possible!" The second guy said and went out of the restroom as fast as he could once he's done pissing.
The next morning in the news, the police confirmed that there had been a murder taking place in the bar and they found the body of the second guy.
Why is that? And what happened in the restroom?