Judge in Aurora shootings and use of drugs for competency tests . Arthur Caplan : No drug can shed light on mindset of shooting suspect Holmes . He says ` ` truth serum , '' or sodium chloride , is used as anesthesia for surgeries . Holmes : They also grow more compliant , tending to agree with those asking them leading questions . Only Hollywood likes the idea of ` ` truth serum , '' not scientists .
Judge in Aurora shootings and use of drugs for competency tests . Arthur Caplan : No drug can shed light on mindset of shooting suspect Holmes . He says ` ` truth serum , '' or sodium chloride , is used as anesthesia for surgeries . Holmes : Only Hollywood likes the idea of ` ` truth serum , '' not scientists .