Rear Noise on 2009 Hyundai Sonata

When coming to stop when braking hear a slight knock or creak from rear Had sound diagnosed was told rear brakes pads need to be replaced. Had pads replaced still hear noise when letting off the pedal and reapplying brakes when moving slow. Could this be a rear suspension problem and not the brakes?

Asked by for the 2009 Hyundai Sonata
Were the rotors turned as well, maybe glazed.
Yes rotors were turned and machined.
I would have to hear the noise, no sense guessing, could add to confusion.