Joining in, Izzy.
I normally do the investigations for my shop, as I am the combat magick and evocation specialist. We have had the normal stuff, but we had a real interesting case back in the late nineties with a local boarding house. Seems that the original owner of the house had killed his wife then himself about a year after completion. From then on, so long as they let the room the original owner and his wife had slept in to a single person, all was well. But the minute they let the room to a couple, the couple would get increasingly weird until the man would try to kill the woman and then himself. They only had a few actual injuries and no deaths, so it took a while for people to put 2 and 2 together. Eventually they did and me and my team at the time went in.
I figured it was a weird case right off the bat, because it seemed contradictory. The fact the couples were re-enacting the events of the original owners implied a "drone" or "recording" ghost...a shell or klippoth for us "in the know" types. But drones can't possess, only a real honest-to-goodness psyche can do this, whether ghost or some other. But real ghosts and other spirits don't generally re-enact things. So the pre-investigation workup was contradictory. I looked to other cases.
I thought I could have a seriously bad scene, because the only other cases where I could find such a contradictory scene were in cases with a demonic infestation, such as the famous Amityville case. In that case, George Lutz was apparently influenced to take on the appearance and behavior of Ronald Defeo and go from room to room in a fugue state in the middle of the night in the same pattern Defeo had followed the night he murdered his family.
So after all of this, we go in. It was me (magicks), a medium named Raven, a power-amplifier named Sid, and a grounder named River.
First thing we did is track for hot and cold spots...and found none, which was weird. Then we planted our medium and got him tranced...again, nothing. Brought him up and and conferred. We had nothing. So I decided it was safer to assume the worse...demon or demons.
So I busted out a black felt mat, some powdered chalk and lime, and some glue and whipped up a Triangle of Manifestation. For you civilians, this is a magickal device meant to force a demon or spirit into manifestation and trap it in the circle. I get the incenses going and prepare some asafoetida and pull my Dagger of the Art, I donned the Five Treasures of Solomon, and got to work.
About 45 minutes of badly conjugated Latin peppered with Hebrew Holy Names later, and I am getting nowhere. Eventually I had to conclude there was nothing demonic, angelic, or otherwise anywhere within the domain of the house.
We were really, really stumped. We leave, and get drunk. Back in those days, for some reason I thought this helped. But the idea comes up of going to city hall and pulling the public records on the house. The next day we do that, and in the time it took to fill the request, we asked the current owner of the house for any details they had on the architecture of the house... it proved to be whole case. A couple weeks later we had it figured out.
The house had been built to be a boarding house, even though the original owner had not used it as such. The house had originally had 3 bathrooms, and the copper piping had gone in a ring around the pertinent bedroom...four pipes, at the bottom, top, and two evenly spaced in-between.
So what we had was an almost cubic room, bound all around with copper tubing with running water constantly running through it...we had an energy-trap. The original couple had the real issues, the room bound them in, and the couple just stewed in their own emotional juices while pouring in new nastiness as they continued manifesting it. Garbage in, garbage out, and the room never emptied out, so the room just became a sewer of dissent, despair, madness and hatred. Eventually when the guy killed his wife and then himself, the room trapped the murders and the horror of the people finding them. When a single person moved in, the dissent which was the main focus of the original emotional content stayed untriggered, and the room would simply continue storing up whatever the person there put in. But if it was a couple, any feelings of dissent would discharge the room like a huge battery, and the couple would start manifesting the discharge.
So in this case, the room didn't have a drone-ghost, the room was a drone-ghost, or rather a big storage matrix for energy. Fixing it was easy...thankfully the 3rd upstairs half-bathroom was no longer in use and had been remodeled as a closet, so one pipe was just capped off and was not in use. We clipped the pipe in the wall outside the room, capped it, and took out a section, breaking the semi-cube of copper and de-constructing the accidental "battery".
A long cleansing later, and the room was fine, and the problem never recurred. The owner later was able to sell the house at a profit.
We referred to the case forever after as "The Case of the House of Angles". What can I say? We tried to have fun and not take ourselves too seriously...for awhile we were very into puns..."The Case of the Evil Cemetery Plot", the "Evil Pyramid Scam", etc, etc...a way of dealing with the weirdness.
Anyway, I hope that tale earns me a place in the club!