In the last 5 minutes of the show the dad is getting ready to leave the interrogation room and puts his hand on the wall between the window and the door to steady himself. The Genius points this out and after the camera changes angles the dad's hand has moved to next to the window.
All they can get from tire marks on the floor is a wheelbase estimate. And it's not possible to accurately state the manufacturer, year, and model from a wheelbase estimate. And yet they have someone who does all three. There is some variation is wheelbase from model to model and manufacturer to manufacturer. But many wheelbase lengths are shared by many different cars.
When Goran goes into Roger's room and then the closet, he is doing so without consent. In fact, his father tells him to leave. Goran is breaking Roger's 4th Amendment right against illegal searches. If he does not have a search warranty, he is not allowed to do these things.
When Roger is unlocking the door at his apartment, the door starts opening before he puts the key in the lock. The lock is clearly not engaged.
Goren offers his bare hand to Coffman to smell the "intoxicating" smell of Italian leather from the Ferrari, but Goren wore leather gloves when he gripped the steering wheel while sitting in the car.