>> reporter: sheriffs deputies discovered it in the wheel well of sam's pickup. police also found evidence that both danielle and michael were taking surveillance photos of sam and dianne. this is a photo taken of them on sam's boat. in this one, they're on dianne's balcony. >> michael would have been somewhere across the lake there. and that's where he would have been hiding in the bushes. >> reporter: it seems like a perfect spot, actually, if you wanted to spy on someone. >> absolutely. >> reporter: but detectives said the couple only got bolder from there. they discovered evidence michael had brazenly broken into dianne's apartment and videotaped the inside. >> inside the belly of the beast. >> he's narrating. i believe his first words were, i'm in the belly of the beast. and his first thing when he pans over was of the alarm pad where it wasn't armed. >> that could have been bad, huh? >> reporter: as michael documented every aspect of dianne's personal life, poking around her drawers, her refrigerator, even inside her bathroom, police said danielle played lookout.