I know a woman who was held in sexual bondage for five years by a serial killer. I believe her because I know her quite well and because I once met the serial killer.
She went to the FBI but they did not believe her.
My plan is to substantiate her claims then turn the evidence over to law enforcement. The reason I have not already done so is opportunity cost.
I know many unusual people, not just my friend and her sexual predator.
A while back I did report the murder of a drug informant. I dont know how that turned out because law enforcement officers do not discuss their investigations with the public until after they make an arrest.
I also scared the crap out of an FBI agent by explaining how to make a high explosive detonator out of any flavor of Kool-Ade mix other than lemon. There are other precursors but all can be purchased at any supermarket.
I know several convicted murderers; some are good friends of mine. A few I met in the forensic unit of Western State Hospital in Lakewood Washington. Were they to overcome their madness they would be discharged but that is uncommon.