stover disappeared. skagit county sheriff's detective dan luvera, now mark stover's big new house and just knew something very bad happened here. but what? >> there was no signs of a struggle. there was just a little bit of blood here and there. >> reporter: of course, mark's protection dog, ding, was clearly injured. that could explain those bits of blood. >> reporter: but in here, earlier that day, just inside the carport door, luvera's investigation team had been knocked back by the overwhelming odor of bleach. and here in the bathroom off the hall, they found clorox bottles. looked like someone tried to wash away evidence. this had to be more than just an injured dog. mark stover's employees told about the strange events the previous morning. the barking dogs, the odd business of the locked carport door, the man wearing mark's clothes, roaring down the driveway in mark's white chevy station wagon.