Unfortunately, a lot of jurisdictions see the act of running over a group of cyclists (or one cyclist) as "a mistake", even if that "mistake" was part of an intentional act of intimidation. Sort of like trying to frighten someone by swinging a baseball bat at them, and then 'mistakenly' cracking them in the skull. Whoops, my bad.
"Rolling Coal" is illegal in some areas. I had turned over a video from my GoPro camera on my bike of someone doing just that. The driver was found (the GoPro got a clear picture of the truck tag before the cloud of diesel soot obscured the view) and the driver was given a citation.
As has been stated, there will probably be little done legally to punish this kid. At the worst, he will probably get a fine and possibly a suspension of his license. However, the civil lawsuits will hopefully teach him (and his parents, who most likely bought him the truck, or allowed him to drive it) a long lasting lesson.