2012 Jeep Wrangler brakes problems

Date of occurrence: 10/30/2015 after several minutes unattended, the parking brake spontaneously failed. The vehicle rolled down the driveway, coming to rest after hitting a tree in the neighbor's yard. The local police were notified; no report filed due to the only private property involved. Injuries to the owner when trying to catch the vehicle include, but not limited to: severe facial trauma and loss of consciousness, dislocated left shoulder requiring surgery, broken 4th and 5th ribs, broken bone in left hand.

After a 30 mile trip, I discovered that the left front brake of my jeep wrangler was overheated, confirmed by a distinct burning smell, an extremely hot left front wheel, and a pulling sensation when brakes were applied. The next day, I took the vehicle to an authorized jeep dealer for diagnosis and repair. I was told that both front brake calipers were "bad", and needed replacing. The vehicle has only 69,000 miles on the odometer. My 2012 dodge journey had the exact same problem with the rear brake caliper.