Snipped by me, for focus.
Do we know what kind of psychotropic medication we are talking about there?
The word 'psychotropic' is powerful. But many substances, from mild anti-depressants like sertraline/fluoxetine, to nicotine (!), to clonazepam/diazepam (basically benzos) belong to that category. If someone is in manic state, breaking items and trying to hurt themselves/the guards, I understand injecting them with some kind of benzo/antipsychotic.
Now, if the proposition is that someone on benzos/antidepressants is more likely to confess? I would argue the opposite. They are most likely to become lethargic, because, sedatives, well. Cause sedation. Less likely to have the energy to, according to Dr Wala, anxiously ask for their therapist to call their family, and stay while they confess, IMO. Lithium, for example, is more likely to give you hard to understand, slurred speech than make you vulnerable to suggestions.
Again, it all depends on what type of psychotropic medication we are talking about, but IMO the most likely meds would not have been a contributing factor to the confessions. This is a list of common side effects for every psychotropic drug:
https://www.hhs.texas.gov/sites/def...Psychotropic-Medications-and-Side-Effects.pdf