As someone with a chronic medical condition that was misdiagnosed for ~20 years, I admit to having biases about this sort of thing, but I can assure you that my doubts are not limited to police-involved situations or EMTs.
The police just randomly assaulted him twice at two different times, then called the medics both times and filed false reports about what happened? Not only does this make absolutely no sense, but seems pretty easy to dismantle if false. Murdock claims that the police attacked him in his home twice. The police claim that he was attempting to break into two different homes. Which of these is more likely? Someone supposedly reported him both times. At least one medic saw him. Are these people in on the conspiracy or made up (seems easy to confirm that these are real people)?
This is tragic, and it is entirely possible that Ian Murdock was a victim of abuse by the police during his arrest/while in custody, but it also seems like Ian Murdock had some sort of mental break before all this happened (I seriously doubt this was all the result of just alcohol use). Given the (presumed) suicide, I wonder if he had some long term mental illness. He very well might have been delusional or psychotic during all this.
I actually didn't state that police killed Ian Murdock, just that his (presumed) suicide could have been the result of the emotional trauma from the beatings. I can not speak for anyone else.
Isn't that almost exactly what clearing him for release means? What else are the medics "clearing him" for if not the absence of major/dangerous injuries? I suppose they cannot "guarantee" the lack of injury, but they certainly would have checked for evidence of traumatic brain injury.
It's possible that they missed something, but this is currently unjustified paranoia with nothing behind it except distrust toward the police.