she is a whore. you shouldn't be with someone like that. i hope we can see each other soon, and then with a shudder dave realized, cari did see him. she seemed to be watching his every move. olt014 >> it was very common for me to get messages, e-mails or whatever that say, oh, i see you through your window. you're doing this, and i'd go, i am doing this. okay. great, and i'd haul ass outside, go looking for somebody cause somebody knows what i'm doing. >> reporter: even more disturbing, cari messaged dave that she'd taken his extra apartment key, and had been coming, and going when he wasn't there. liz got unsettling emails too. i am out in your garage so what should i do to tour car. i see my handy work is still on the wall. attached to the email, a photo to prove cari was there. eventually the messages got threatening. cari wrote dave a note claiming she'd kidnapped liz. you will do exactly as i say and then i will let her go. do it, or say goodbye to her. attached was this photo, a woman bound. couldn't see her face, but was that liz? >> i had told her, b.s., that's crock of crap. i don't believe you. go away. leave me alone.