I have taken similar drugs for insomnia and I don't think they would outright cause delusional confessions. I do think that they could relax a person enough to

I have taken similar drugs for insomnia and I don't think they would outright cause delusional confessions. I do think that they could relax a person enough to continue with a plan that they might not have been as likely to execute otherwise. Anecdotal: I was having reservations about a relationship and wasn't sure if I was willing to stay involved. In a relaxed state from pain medications related to a standard medical procedure, I finally said that I wanted out. I wouldn't have said it (at that moment) if I hadn't been sedated to the point of an above average sense of wellbeing. After the effects diminished, I realized that I was not as ready to live with the outcome and wished I had taken more time to think it over. If Quick was already on the edge of making a false confession for the purpose of gaining attention or fame, this scenario would make sense. Whether that was the situation, I have no idea.