Joe Patch was man who raped Kelly Taylor in a dark alley as she arriving for her meeting with Dylan McKay. Joe happened to be a client of Matt Durning, who ended up getting Patch off on a technicality.
Later, Joe returned to Matt's office and wanted to sue the police for police brutality, citing double vision and migraines, though he was clearly making it up.
After a meeting with Matt, Joe wandered down into Now Wear This, where Kelly was about to close up. As Joe locked the door and took out his knife, Kelly shot him multiple times as he came towards her.