According to every level of collision investigation across the US....
Criminal proceedings against anyone involved in a vehicular collision go off of the "primary collision factor" or PCF. There could be multiple things that went wrong in a collision, but there's 1 involved party which did the *one thing* which, if not done, would have avoided the collision.
In this dick face bicyclists case... yes, the vehicle was crowding the bicycle father to the right, not cool, I get it...
.... then the bicyclist's inner 5 year-old came out and he drifted left (likely purposely) in front of that 5000-6000 point vehicle way too close (potentially unsafe lane change and without proper signal). Then BikeDick (purposely?) slowed down to clearly an unsafe-for-given-conditions speed on a green light, causing the vehicle he cut off just a couple seconds earlier, to not have enough time or space to see/react to...thus the bicyclist is likely at fault based on my view of the incident.
Would a prosecutor bring charges if he was a most likely cause of his own demise? Doubt it, but crazier things have happened.