ChiefMedicalOfficer: Give psychoanalysis.
Psychology won't help much here, unfortunately.
You do, of course, know his entire psychological profile. You don't have official access, sure, but you're the one who operated the neural bridge when HeadOfSecurity's psychoparadigm was extracted for records.
The only issue is that all it tells you is that he's incredibly unlikely to back down. His records look a little something like this: