Rear trailing arms or more??

My son hit a curb pretty hard and cracked the rim/wheel on the rear drivers side which made the tire go inward. He drove it home about 20 miles or so. I looked underneath and it appears that the trailing arm is rubbing against the tire. However, the right tire trailing arm is also hitting that tire and it also appears the tire is also at an angle. Is the trailing arms connected in the middle of the car or what is causing the right side to be like this when it is the left wheel that got hit?