Visible crew/equipment: As Tina swerves off of the road after seeing her mum get killed by Jason in the middle of the road, if you look in the back of the car, you can see a camera set up, filming the shots in the back seat. (00:43:15)
Visible crew/equipment: When the girl is knocking on the door while saying "Maddy?" you can see several shadows from persons moving alongside the wall beside her, even though she is supposed to be alone there. (00:59:15)
Visible crew/equipment: When Jason is walking down in the forest you can see three spotlights on the upper right. (01:02:55)
Visible crew/equipment: When Jason pushes Dr. Crews down the hill, as he's falling, you can see some kind of equipment attached to the back of his pants. (01:10:45)
Visible crew/equipment: When the girl is looking for David in a dark room you can see the film crew member holding the microphone reflected in the window while he is moving it. (01:00:00)
Answer: He's just... not a good guy. I don't think it's any deeper than that - he thought he could exploit her for personal gain. Some people are just slimy and like to take advantage of others for their own purposes.
TedStixon