Rebecca went for a mediation today too. She said there were many people complaining about the cats (which seem to come out at specific times) but that she did not see the cat today when she was down (during one of these times). No one in the block seems to know whose cat it is, though the complainant is quite sure it is someone's cat. She also said that quite a few of the doors were wired up. I went by this same block back in November to deal with a different complaint at the time.
It may be necessary to flyer the block if that's the case and HOPE the complainant will call.