Trouble is, they don't agree on who it is.
"Riverdale" Season 2 has been dropping characters like "Game of Thrones," with the first two episodes both ending with surprise murder/attempted murders, in addition to the shooting of Archie's dad Fred, who (thankfully) survived.
The late Ms. Grundy, and the alive Moose Mason and Midge Klump, all appeared to have been attacked by the same guy who shot Fred. But whodunnit?
"Riverdale" viewers are on the case. They've been piecing together clues, rounding up a list of suspects (including Hal Cooper and Sheriff Keller) and sharing theories online: