the medulla, or central core of animal hairs, can help identify the breed. in this case, analysts determined the hair was from a bernese mountain dog, tricolored and usually very large. the only other evidence at the scene was on the gate that led to the garbage dump. it looked as if a car had hit it to force it open. >> there was some brownish paint transfers on the gate at the compost site from the gate being pushed open by a car. >> and there was a small, plastic fragment that looked like a piece of the car's bumper. a witness told police that he saw michael's black mercedes benz in the lake parking lot next to a small brown vehicle similar in color to the piece of bumper found at the compost site. >> he also stated that the car possibly could have been a mazda 626.