Connor is a friend of Justin.
When Ben Foster is killed by a werewolf attack, hunters Sam and Dean Winchester and Claire Novak come to investigate. The initial suspect is Justin, who is believed to be clean and innocent after all three interview him.
Connor, who was also interviewed by Claire, had behaved inappropriately by being "grabby". This leads Sam and Dean to suspect him as the culprit, and the two confront him. Dean questions Connor on his behavior. When Connor tells him girls like that kind of treatment, Dean threatens to break his face.
Later, the Winchesters suspect Connor of being the werewolf and Dean pins him to a wall while Sam touches a silver knife to his hand. When Connor has no reaction to the silver, the Winchesters realize that he's innocent.