>> reporter: occasionally, that sort of thing would happen. >> very seldom. very seldom to that extent. >> reporter: then, 8:00 a.m., amber arrived at the kennels. and still the dogs were upset. >> they would not settle in that morning. >> reporter: odd. then someone told her mark was still around. he mustn't have left yet for seattle. >> and i thought that was strange because he was supposed to be gone over an hour prior. >> reporter: she walked to the house where mark made a habit of leaving the carport door unlocked so the employees could use the bathroom. >> and i noticed a little bit of blood in the driveway. i was afraid that his dog had opened her stitches because she'd had surgery. >> reporter: mark's dog, ding, wasn't just any pet. she was a highly skilled protection dog. a lot of blood, a little blood? >> a little blood. >> reporter: but noticeable. >> noticeable. and i proceeded towards the house and tried to go through the back door, and it was locked, which was very, very