According to the Pima County Medical Examiner, a version of Xanax along with Fentanyl was located from the entire body of the 21-year-old.
A toxicology report also showed Lil Peep expired from a mix of medication.
Thus far, the death of Lil Peep was ruled a crash, but authorities are investigating the way the medication was got by him.
Records obtained reveal a "combined hazardous effects of Fentanyl and also Alprazolam" caused Lil Peep's departure.
Although Alprazolam is still a knock-off of this Xanax brand Heroin is cut with Fentanyl.
Lil Peep has been discovered dead on November 15th, in his tour bus at Tucson, Arizona.