Brief report on rohypnol, also called " roofies " or the " date rape drug ". This colorless, odorless anesthetic is sometimes used to lessen resistance and erase memories of a sexual assault. Simple prevention tactics - never leaving a drink unattended and never drinking beverages given by people whose motives could be questioned - are noted. Originally broadcast on May 31, 1996. Host Tom Jarriel. Study guide available. Closed captioned.