I'd counter you on that one. Halcyon usually turns people into drooling masses of flesh. I've seen this look before on my very brother when he was DTing from painkillers. It said in numerous media releases that he'd taken painkillers, and I'd bet now that he's in prison, he can't get the drugs since he was likely buying them on the street.
I'd say he's in a DT fog and having a hard time comprehending what's going on.
DTs usually are very anxious and fidgeting. They literally can sit still. Also will have runny nose and eyes as well as a good case of diarrhea. I stand by my observation. He is an a stiff dose of antipsychotics.... And I think he probably is psychotic. That’s one that is really hard to fake