The Trash Bag Killer just won’t stop stalking Betty, and everyone knows he has some sort of twisted affection for her. With the prime suspect (Glen) becoming TBK’s latest victim, Riverdale fans are trying to piece together theories about who the Trash Bag Killer is.
A serial killer who’s fiercely protective of Betty? Seen that before. Betty shot her half-brother Charles in Season 5, but then confirmed he was recovering in the ICU. That means he’s probably not dead, making him a prime TBK suspect.
Hiram is presumably dead, but fans know that doesn’t really mean anything on Riverdale. If he was able to fake his death, TBK may be his way to secretly return to Riverdale and get his hands bloody again.
Viewers still don’t know a lot about Percival, other than the fact that he’s going to be a villain in Season 6. This may lead up to the big reveal that he’s been the killer all along.
A particularly twisted theory that has emerged is that Jughead could be entering a fugue state and becoming TBK to get out his frustrations with Betty. His blackouts, hallucinations, and that angry voicemail he left Betty seem to support this.