According to the Pershing County Sheriff's Office in Nevada, Schnabel was busted just after midnight on September 3 for distribution and manufacture of a controlled substance.
The criminal complaint filed in the case lists that substance as Psilocybin, which is the fancy name for psychedelic mushrooms. Psilocybin is a Schedule I controlled substance and the distribution and manufacture of a controlled substance charge is a felony.
Schnabel was booked into the county jail and released shortly thereafter.
It's worth noting — Schnabel was busted at Burning Man, a music festival in Nevada where it's safe to say more people are on drugs that aren't.
Klum and Schnabel dated for three-and-a-half years and Klum confirmed their split with PEOPLE earlier this week.