She didn’t go to the hospital within 12 hrs of the incident which is after the evidence of the ruffie could be detected. Plus the standard drug testing doesn’t test for it..
“The first thing to know about GHB and drug tests is that neither GHB nor its metabolites (the substances it is broken down into by the body) are tested for in the standard drug test. The basic drug test, currently used for nearly all testing programs (corporate, school, sports & judicial), checks for 5 types of substances
Cannabinoids (marijuana, hash)
Cocaine (cocaine, crack, benzoylecognine)
Amphetamines (amphetamines, methamphetamines, speed)
Opiates (heroin, opium, codeine, morphine)
Phencyclidine (PCP)