The Leelanau County sheriff received blood test results in connection to a crash that killed three people.
The crash happened two weeks ago on South Manitou Trail between Schomberg and Overby Road.
A car with five people inside veered off the road and hit a tree.
Three people died.
The sheriff’s office says Brian Surhigh, the driver, had elevated levels of THC in his system.
The investigation into the crash is now closed.