So I got some clarification on the situation the night of the accident. The guy was riding with a friend at the time. Where the accident happened, the friend took a right in a turning lane, but the accident victim went straight to go home. Its still unknown whether or not the guy ran the light, but his friend had no idea the accident occurred. So, one good thing to take out of the story, is that the rider's friend(s) didn't leave him for dead.
Below is a diagram of the accident. The car is the red arrow, the downed rider in black, and the rider's friend in green. As you can see, the friend could not have known that there was as accident.
