Also in the police report, I believe his brother said he had been using DMT and he tested positive for what was likely Adderall. He was in a unique state to truly be paranoid and throwing psychedelics in the mix could cause one to try to cope in ways that challenge reality.

Of course, this also would be the perfect time to stage a murder and it's not improbable that someone did discuss killing him. Also DMT only last 5-10 minutes, he certainly wasn't driving while doing it and if anything, it can give you a sense of peace and acceptance to the craziness of life.