Police say it will be a week or more before investigators wrap up the case of a Michigan State Police trooper who was killed while riding a motorcycle in northern Oakland County.
The report will go to the county prosecutor.
Lt. Mike Shaw says the 72-year-old driver is cooperating and is not in custody. He was pulling a trailer when Trooper Chad Wolf was hit on Dixie Highway last week.
Wolf's funeral was held Tuesday at Fenton High School. Officers from across the country attended.
Oakland County employees can wear casual clothes to work Thursday if they donate at least $1 to help Wolf's wife and four children.
Many days still ahead in investigation of trooper's death
