Scopolamine as "Truth Serum"
Early in this century physicians began to employ scopolamine, along with morphine and chloroform, to induce a state of "twilight sleep" during childbirth. A constituent of henbane, scopolamine was known to produce sedation and drowsiness, confusion and disorientation, incoordination, and amnesia for events experienced during intoxication. Yet physicians noted that women in twilight sleep answered questions accurately and often volunteered exceedingly candid remarks.
In 1922 it occurred to Robert House, a Dallas, Texas, obstetrician, that a similar technique might be employed in the interrogation of suspected criminals, and he arranged to interview under scopolamine two prisoners in the Dallas county jail whose guilt seemed clearly confirmed. Under the drug, both men denied the charges on which they were held; and both, upon trial, were found not guilty. Enthusiastic at this success, House concluded that a patient under the influence of scopolamine "cannot create a lie ... and there is no power to think or reason."14 His experiment and this conclusion attracted wide attention, and the idea of a "truth" drug was thus launched upon the public consciousness.
The phrase "truth serum" is believed to have appeared first in a news report of House's experiment in the Los Angeles Record, sometime in 1922. House resisted the term for a while but eventually came to employ it regularly himself. He published some eleven articles on scopolamine in the years 1921-1929, with a noticeable increase in polemical zeal as time went on. What had begun as something of a scientific statement turned finally into a dedicated crusade by the "father of truth serum" on behalf of his offspring, wherein he was "grossly indulgent of its wayward behavior and stubbornly proud of its minor achievements."11
Only a handful of cases in which scopolamine was used for police interrogation came to public notice, though there is evidence suggesting that some police forces may have used it extensively. 2, 16 One police writer claims that the threat of scopolamine interrogation has been effective in extracting confessions from criminal suspects, who are told they will first be rendered unconscious by chloral hydrate placed covertly in their coffee or drinking water.16
Because of a number of undesirable side effects, scopolamine was shortly disqualified as a "truth" drug. Among the most disabling of the side effects are hallucinations, disturbed perception, somnolence, and physiological phenomena such as headache, rapid heart, and blurred vision, which distract the subject from the central purpose of the interview. Furthermore, the physical action is long, far outlasting the psychological effects. Scopolomine continues, in some cases, to make anesthesia and surgery safer by drying the mouth and throat and reducing secretions that might obstruct the air passages. But the fantastically, almost painfully, dry "desert" mouth brought on by the drug is hardly conducive to free talking, even in a tractable subject.
Connect With Us