This photo shows the tire tracks where the man’s pickup ran off the road and crashed into a tree. Photo from Woodtv.com.

Police believe alcohol and speed may have been a factor in a crash that killed a Courtland Township man early Wednesday morning.

According to the Kent County Sheriff Department, an off-duty Grand Rapids police officer came upon the crash scene on 14 Mile Ct, near Northland Drive, shortly before 2 a.m., April 12, and discovered a 56-year-old Rockford man unresponsive, after striking a tree with his pickup truck.

The Sheriff Department, Courtland Fire/Rescue, and Rockford Ambulance then responded to the scene.

The man was identified as Jeffery Alan Peterson, 56, of Courtland Township. He was driving a 2008 Lincoln Mark LT. He was the only person in the vehicle.

The crash is still under investigation.