Update on the Rottweiler (see entry "Good cop.").

I called Pima Animal Care Center last week to ask if they had received a Rottweiler from the police.  I've been told previously that when the police find stray house pets, they turn them in to PACC.  They said that none had been turned in that night or the next day by the police or anyone else.  The good news is that apparently, the dog did not end up at PACC.  Perhaps someone took on his case and tried to find his owner.  That's all I have and I wish the dog luck.