A trooper was dispatched around 12:15 a.m. to a location about a mile south of Crown Point, where it was learned the truck drove off the highway and overturned, resulting in the trailer breaking open and spilling the mail, Fifield said.

Police secured a warrant for a blood draw from the driver, Srdan Bezharevic, and he was taken to the Lake County Jail, police said.

Bezharevic was reportedly found to be in possession of a white powdery substance and faces a felony count of possessing a controlled substance and misdemeanor OWI charges, Fifield said.

Cleanup at the scene continued through the morning rush hour, he said, as the towing company had to offload the contents of the trailer and load it into another trailer.