Who Killed Jason Blossom? Breaking Down Riverdale's Biggest Mystery

Just because Ms. Grundy has left Riverdale doesn't mean she's not a suspect. The woman had been carrying on an affair with a teenager before she was caught red-handed lying about her name and credentials. Her explanation is that she's on the run from an abusive relationship, which is an airtight excuse, but the last look we get at her (wearing sexy sunglasses and eyeing up some young gentlemen) indicates that she's not that innocent.