I've heard many a conversations in public about it.
If you asked me, you could argue what's been stated in the media in two ways. Freddie's actions read like a Dave Chapelle skit. He ran from the cops, acted limp hence no seatbelt they tossed him the van, then injured himself in the van to avoid bail/jail/get in trouble.
On the otherhand, he was injured by the cops when caught, tossed in the van with no regard for his safety, he screamed for help but they ignored him and hit the breaks thereby he was further injured from whiplash/snapped neck.
I'm of the opinion the likely scenario is the second. The cops involved should be charged for manslaughter for law enforcement negligence (no seatbelt), or murder if there's evidence they intented to injure a member of the publc. Disregard for public safety is criminal, especially when perpetrated by public officers who are supposed to protect the public. Worse than thuggery.