There was a serial killer in Oklahoma who went out with his wife, sometimes his daughter, and picked up women to bring home. They would pose as a couple and try and seduce them to come home for a threesome, often working.
He would drug them, strap them in a dentists chair inside an insulated sea-can in their backyard. They would rape, sodomize, then eventually just bleed them to their death. All recorded on VHS, all recovered by FBI.
Caught when a victim had her wrists slit, and unrestrained because they believed her to be unconscious. She escaped, ran, and alerted a neighbor and a driver passing by on a rural road. Police arrested them without incident. I wish I could remember the name. All-in-all it was about 23 women in total that were done like this. Wish I could remember the name, at the time I was going through a weird porn phase of like forced orgasm denial, sleep sex, extreme restraint, impact play, you know, that ol' chestnut, and I thought these would be cool as shit to see. Needless to say, I recovered and I'm back to regular ol' normie tier porn. Either way. See if you can find the name, and you'll see that there were A LOT of tapes. Some crime scene photos were released but not many. One was the Panasonic VHS camera that at the time, would have cost around $4500-5000, on a tripod in the sea-can with the chair.