2005 Jeep Grand Cherokee body & structure problems

I was sitting at a red light and a florida state trooper was behind me, also stopped. When the light turned green, the cars in front of me started to move forward so I took my foot off of the brake to ease forward, awaiting to hit the gas when the trooper hit his gas, slamming into the back of my jeep so hard that it lifted the back of my jeep up and forced the front end to hit the vehicle in front of me at the bottom of his rear bumper - pushing me forward into the car in front of me approximately 7 feet.

When backing into parking space the car took off like a rocket ship/full throttle (5.7 hemi) like it had a mind of it's own. The result was property damage (unknown amount) and car damage over $7600.00 not including car rental for 2 weeks. Chrysler sent inspector to body shop and their determination was they found nothing wrong and said the case is closed. A jeep/chrysler dealership replaced the throttle body january 31, 2014 under warranty. We know this was not driver error.