2009 Dodge Charger engine problems

In the last four months, my 2009 dodge charger has stalled three times without warning. It doesn't sputter, then die. It just shuts down. The first two times, I was driving straight. This last time, 12/08/14, I was turning in a parking lot. I lost my power steering and my power breaks. I hit the concrete base of a light pole hard enough to blow out my front driver-side tire and bent the tie rod. There is quite a bit of damage to the front quarter panel, bumper and broke the headlight.

This is a dodge charger in the austin independent school district's police force fleet. After performing routine maintenance and upon start up, the auto began to have a hard engine knock. After further investigation we found that a valve seat had failed and entered the piston cylinder causing a catastrophic engine failure. The engine is a 5.7 hemi. This is the second dodge 5.7 hemi to have this type of engine failure in less then a year, and at about the same engine mileage.