From Redditor /u/voteforbetti31:
Not me specifically, but my mother used to work at a hotel in Washington, DC back in the 90s as a housekeeper/maid. She needed money because she was a refugee from Vietnam. Even though she didn't know much English at the time, she knew enough to get by at her job and all the other staff and hotel guests loved her because of how sweet she was. Because of this, any time high-profile guests (such as the Backstreet Boys) would stay at the hotel, the manager always sent my mom to clean the room since she was good at it.
Anyway, one day, a guest came. We'll refer to him as Mr. M because I don't know his real name. He checked in to their most expensive suite. As usual, the manager told my mom to take care of his room. As she got there, there was a 'Do Not Disturb' sign, so she told the manager she would come back later. What was weird was that no one was ever allowed in his room. The man stayed there for over a month, and not one time did he let staff come in to clean. However, he paid a lot and he gave a warm welcome every time he passed a staff member/housekeeper, so no one paid him any attention.
Then one day, people didn't see him anymore, so they assumed he checked out, even though the receptionist had no account of this. Since it had been so long since the room was cleaned and the 'Do Not Disturb' sign wasn't on the door anymore, the manager told my mom to go check it out and try to clean up what she could. As she got to the floor and unlocked the door to the room, a disturbing smell hit her. She couldn't figure out what it was, but she continued to survey the room, which was disgustingly messy. Her words were that 'it looked like someone had thrown a rave,' even though no other guests seemed to have ever gone into the room besides Mr. M.
It had looked like Mr. M had deserted the place without telling anyone. My mom was still shocked by the smell, so she tried to track it down. As she followed the smell, she could tell it was coming from the hotel room closet. When she opened the closet, there was nothing but a cardboard box on the ground from which the smell was resonating.
My mother's first instinct was to open the box to see what it was and clean/throw it out. When she opened the box, what she saw scarred her to this day. It was the rotting/decomposing head of a young woman, chopped off. My mother immediately screamed and got out of there, where she fainted in the elevator.
Once she woke up, cops were everywhere and the hotel was like a CSI scene. The manager told her that Mr. M wasn't his real name and he used a fake credit card to check in. The head of the woman was identified to be like a call girl/prostitute-type person. I don't know much more or any nitty gritty details, but I'm sure one can look it up on the Internet for more information. Needless to say, my mom quit that day.