he sat in this manner. sleeping at moments. reporter: and sipping his signature drink, dr. pepper. reporter: free on bail, lars understood he was still under the microscope. it was difficult. he didn t sleep much. reporter: watching lars suffer was torture for ken and kristi. they knew how much their brother loved debbie and how dark and confusing that house could be at night. you felt it was important that we come to the house now. yes, i did. why? because no one realizes how dark it was. we re here. it s around 4:00 in the morning. yes, it is. reporter: this was lars and debbie s bedroom. the bed was on this wall. reporter: ken itzo walked us through the story lars told him countless times he wasn t sure what he was seeing. he just thought it was an intruder, maybe two. there s the thought of, well, debbie s only 5 3 , she s blonde. she was wearing a light t-shirt. how could he not see his own wife? at 4:00 in the morning.
what was he doing when officers were not watching him? he sat in this manner. sleeping at moments. reporter: and sipping his signature drink, dr. pepper. reporter: free on bail, lars understood he was still under the microscope. it was difficult. he didn t sleep much. reporter: watching lars suffer was torture for ken and kristi. they knew how much their brother loved debbie and how dark and confusing that house could be at night. you felt it was important that we come to the house now. yes, i did. why? because no one realizes how dark it was. we re here. it s around 4:00 in the morning. yes, it is. reporter: this was lars and debbie s bedroom. the bed was on this wall. reporter: ken itzo walked us through the story lars told him countless times he wasn t sure what he was seeing. he just thought it was an intruder, maybe two. there s the thought of, well, debbie s only 5 3 , she s blonde. she was wearing a light t-shirt. how could he not see his