"Forensic psychiatrist Dr Sohom Das diagnoses, treats and rehabilitates mentally ill offenders - or the 'criminally insane' - in prisons and secure hospitals, many of whom have committed serious violence, some even murder. He is also an expert witness, and advises on insanity or diminished responsibility pleas - to either steer the incapacitated, the vulnerable and voiceless away from a lifetime of incarceration towards recovery, or literally let...