ding to the vet, then getting to his appointments. >> but other than those wet spots, everything else appeared to be the way mark would have left it. >> i was looking for bloody towels. i was looking for bloody paper towels. the bathroom was immaculate. there was absolutely nothing in the washing machine. there was nothing in the tub. >> stephanie wasn't sure what was going on, but it all felt kind of creepy. >> my thoughts were, well, that was freaky. and i got out of there, and i didn't go back up to the house the rest of the day. >> you went on with the day? >> mm-hmm. >> but a strange day it was. and as the hours ticked by, there was no word from mark. no one could reach him by phone. >> it was very odd that we had not talked to him. it was very strange. >> the following morning, october 29th, still no sign of mark, no word from him at all. again, stephanie went up toward his house. >> and i looked up and there stood ding by the back door.