>> so you went into your mom's room. >> yeah. >> and she was in bed. >> year, we would wake up every morning and then i would go into the room and watch our show. >> do you know what time that was? >> no. >> reporter: larson the youngest son was not interviewed by police back in 2006 because he was only 4 years old. now, he was telling detective gibson he wasn't sure if his mother was alive that morning. he said he only remembered getting out of bed and going to his mom's room. but she didn't answer him. >> i just remember like going into the room and then she wouldn't wake up and i think it was valentines day. >> uh huh. >> yeah, dad was gone, came back and i told him, yeah that she was not waking up. >> reporter: but the two older boys said they did remember seeing their mom that morning. this is lincoln, the middle boy. >> i just remember like waking up and like -- i remember her not feeling good and i was sitting on the stairs and then i