I think this is a very good possibility. Bryce wasn't returning his mom's calls. Mom had a stranger check up on Bryce twice and then called the police and had him searched. Mom had also found out Bryce was on drugs, acting strangely, broke up with his girlfriend (whom she really liked) and also stopped going to his classes just two weeks into the new school year. I imagine mom was pretty angry at her son (I would have been) and I imagine Bryce must have been pretty angry with her, as well (which I also would have been at 19, under the same circumstances.) I wonder if there was any mention of an ultimatum regarding his car in any of the telephone conversations between Bryce and his parents (eg. "Come home now or I am going to take your car away fro you" type of a thing.) The mixture of lack of sleep, drug use and anger might very well have prompted him to push his car off the embankment and walk away. As an after thought he may have smashed the back window to get something out of his bag and cut himself in the process (I think only one article said there was blood outside of the car which might not have been accurate....everything else I read stated the blood was inside the car.) The blood may have also been present in the car prior to it going over the embankment. Family isn't responding about the blood evidence in or around the vehicle.