Except that there is no toxicology report. Only an anonymous guy on Hannity who says that's what he heard.
You know as well as I do Hannity and his producers would never have let anyone but a real Baltimore police officer on his program. That is the sort of thing you verify so you can avoid risking a lawsuit.
But, there is affidavit from the prisoner in the van that said Freddie was banging his head against the wall of the van, for whatever reason. Do that and you spill and land head first, you can break your own. Again, prove otherwise.