Dog's chase cat's, the Police know this and probably would'nt waste time following it up, i'm sure if you had seen the moggy you would put your dog on the lead where as cat's trail all over with no lead or control, although i'm not a cat fan i would'nt go out of my way to harm one but most cat owner's hate dog's, don't worry to much your dog will not be put to sleep, if you appologised what more can you do?