Mr, Argent may "suspect" that Scott could be a werewolf. The smile than look of disdain Mr. Argent gave Scott at the end of episode 1 when he picked Allison up from school. The suspicious look he had walking on the field after Scott dominated the last half of the game in Episode 2. The way he looked at Scott when he finished the story he told about a harmless dog getting bit and becoming a vicious animal (a la like Scott getting bit bởi the werewolf) in episode 4.
Although he seemed like an protective father when he saw the way Allison looked at Scott with after he hit him with his car. Then his sudden interest in going to Scott's lacrosse game in episode 2. When he saw Scott and Allison Kiss through the window in episode 3. The over assumption yet typical response to Scott's mother about Scott kidnapping Allison in episode 5.
I guess it depends on how bạn interpret what's going on.