By Allison Scarbrough. OCP Editor. HART — The 37-year-old Pentwater man who fled police during a high-speed chase last April that began in Shelby and ended in Holton was sentenced in 27th Circuit Court Monday, June 22, to a minimum of 18 months in a Michigan Department of Corrections prison. James Darin Grabinski, who has been lodged in the Oceana…