Rear end damaged after hitting curb
 

My son has a 2004 Monte Carlo, and he was getting on the freeway yesterday and didn't see a center mediean at the entrance and ran completely up on top of it. The front wheels didn't take any damage that we can see yet, but the rear end did. When the car is sitting still it looks fine, but once you start driving the driver side wheel leans in real bad and the entire rear of the car is swaying to the right...We have taken both rear wheels off and have it on jacks but nothing looks bent or broken or damaged what so ever. What could be causing this?

Bent the rear wheel bearing?