SuperSonic05

When I was getting my car dyno the other day, the operator said that he saw my brake caliper moving during braking. He show me and I saw the pad moving. During one of the Snowstorms that Chicago land has experienced this year, I curbed that wheel pretty hard. He said that sum bushing probably needs replacing and it should be easy for me to do. So, I go home an take off the wheel and I don’t see anything broken bushings. I try move the caliper can can’t. However, because time I didn’t take the caliper of and take the pad out. Now when I during moderate braking at 35+ miles I hear a light squeak come from that tire(I think I wasn't pay attention before),but it go away if I lift up and the brake and press it again. Has had this happen to them? What bushing should I be looking at? Any help would be greatly appreciated.

Thanks
Ryan