Greenfield, WI - Greenfield police have released dramatic footage of officers using a technique to stop a fleeing stolen SUV and causing it to crash.The chase reached speeds of up to 90 mph and took place shortly before 3 a.m. May 6 when an officer tried to pull over a vehicle stolen from a car dealership.Greenfield police explained the use of the "pursuit intervention technique," which involved an officer's squad car hitting the fleeing vehicle and causing it to crash into a pole near S. 27th St. and W. Lincoln Ave. The four occupants inside were apparently unhurt and fled on foot, police said.One occupant was on GPS monitoring for a carjacking involving an elderly woman and another was later reported to have been firing a gun out the window of this vehicle while driving in his neighborhood.