A man found dead June 19 at a music festival at Clinton State Park died of a drug overdose, according to an autopsy released today.

Coroner Erik Mitchell reported that 29-year-old William J. Pospisil who witnesses said went by the nickname “Squirrel” and had no permanent home died from an overdose of methadone and cocaine while attending the Wakarusa Music & Camping Festival.

People who talked to an investigator at the scene described Pospisil as a “transient who traveled around to music festivals,” according to a report. The witnesses said that the previous night, Pospisil had drunk alcohol and taken cocaine, methadone and the anti-anxiety drug Xanax.

They said he had seizures that night and stumbled to a place where he fell asleep for the evening. The next day, he was seen with his eyes open at one point but went to sleep and never woke up.