I beg to differ. The police are in CYA mode since this accident was in part because they were in a high speed pursuit. Their looking at deflecting the liability and insurance claim / lawsuit from the victim because they didn’t back off.
If they can show some evidence of impairment on the victims part then they can try to make a case that this impairment hindered the victims ability to take some sort of evasive action.
The chase video shows the perp’s car swerving directly into the path of semi-truck.
Outside of possibly being pitted or a blown tire it could be a case of suicide.
I watched the video of the crash (post 69 in this thread). There's no action the truck driver could have taken to avoid the crash except to have not been on the road in that place, at that time.
It appears he's in the far right lane (opposing traffic, as far left from chase occurring as possible). It happened in less than a second.