“That’s why it’s the direct responsibility of the cops to investigate all the evidence.”
I would not advise anyone charged with a crime to rely on a the police to exonerate them.
I would strongly suggest that one leave that up to their attorney.
No one said it's up to the police to exonerate anyone because it's not. But it is up to the police to investigate all the evidence regardless. Especially what appears to be real obvious evidence. If this is the actual video used as evidence in court, I'd be seeking an appeal and another trial.