In my hometown growing up of Meriden they had Undercliff and it was thought to be haunted. After years of homing tuberculosis and mental patients of all kinds, rumors of torture and suffering it had dwindled down to housing just kids who were having drug related issues as well as just some bad kids not quite ready for jail but needed to be locked in and evaluated.
Well they only used a portion of this huge facility by the late 70's but they wanted people to stay off the grounds as well as being sure no one was trying to break in to either steal old stuff or even potentially make it a home if they were homeless. So they had a security staff in which 2 people would be on nights from 11-7am and take turns walking the grounds as well as the hallway. These people had to use a key to turn on their carry around to prove what time you hit each area and didn't miss anything. The other had to stay at the main entrance to assure no one was coming in other that those authorized.
I can assure you it was more fun to sit at the main entrance to rather than walk around these dark hallways with open rooms, old beds and old medical products no longer used for patients, occasionally falling or making creeping sounds. And you'd have to leave one building and go to another outside and walk down the hill to hit your last key spot then head back. It was an hourly check and me and a buddy would take turns. Yeah I heard the rumors and I'm not going to tell you I wasn't always waiting for that one time. And there were noises, but the building was old so of course there were. Having said that I never knew they uncovered a body of a famous serial killer on the grounds either as seen in the article above. I will say this, my buddy and I were both going to a Community College (we worked Wed and Fri nights only) and played baseball and hoops together, but rarely did we walk into work the night shift without hitting Gatsby's in Middletown, the Pumpernickel Pub in Wallingford or the Brookside Cafe in Meriden before beginning our detail. Only time we didn't was when we had a baseball game or doubleheader the next morning somehwere. But no matter, the darkness and the history made it fun, but also both of us flew through the points we were required to oversee.