The Kansas City, Missouri FBI office received a tip from a user on the dark web who shared pics of Cassidy Rainwater partially nude in a cage and bound to a gantry crane, and were allegedly advertising selling her flesh on the dark web.
FBI and Dallas County Sherrifs office search one of the men's phone, and find more pictures of Cassidy Rainwater on it. They then searched the man's house, deep in the Ozarks, and found that the two men had murdered and butchered Cassidy Rainwater.
These men strangled her, strung her up from a gantry crane (used to process deer), butchered her, and packaged her flesh in dated vacuumsealed bags in their freezer....
Law enforcement has claimed that these two men were all who were involved, but I find that extremely unlikely, as someone burned down the house while both of these men were in jail. There is no way it was an attempt at vigilante justice, as emergency responders found tripwired explosive booby traps when thet attempted to respond to the fire.
They had to wait for the Springfield Missouri bomb squad unit to arrive to disarm the trap before they could extinguish the flames. I think there was likely more than these 2 men involved... but that's just my speculation.
One final point that is very suspicious to me is that Cassidy Rainwater's mother went missing in 2007 in roughly the same area. Her mother's body parts were eventually found scattered across a field not far from where she went missing/these men live. Her murder was never solved.