Sounds like you may have done some damage to the parking brake shoe and/or hardware. Your going to have to pull the caliper and rotor off to inspect the situation. You may get lucky and just popped one of the brake shoe retainers off.
Does the parking brake still work??
Once you get the rotor off let me know if you need some help locating any parts you need to replace...
Does the parking brake still work??
Once you get the rotor off let me know if you need some help locating any parts you need to replace...