amateur detectives and discovered he was spending time visiting doctors offices. the daughters wondered if he might be a drug addict looking to score. and what they were about to find could confirm fair worst fears. here again is keith morrison. >> reporter: terra newell and cash, her miniature australian shepherd, were inseparable. >> he has unconditional love. and he wants to be there no matter what. >> reporter: terra went to cosmetology school, but chose to work with four legged clients instead, as a dog groomer. >> reporter: what do you like about dogs? >> i really like that they're innocent. they don't have any evil in them unless they were taught to have evil in them. >> reporter: sure. and terra was something of a student of evil. she was a fan of the tv show "the walking dead." zombies.