The murderer in the video was driving around with an assualt rifle in his front seat and was driving 98MPH.
This vet was probably was waiting for years to have an excuse to use that rifle to kill someone (while else would he drive around with it?)
He got his chance... and it was all captured on video... sealing his fate
I wonder if the vet realized that his life was over as he got into his truck and sped away from the murder scene