bixby knolls. until, finally, after 11 years, they had a son. who grew up to be charlie. as parents, they encouraged him to try new things. >> the olympics and we were watching gymnastics. i turned around to my parents and i go i'm gonna do that. and i think like a month later, i enrolled in gymnastics. so it was very much a supportive environment. >> reporter: and lynn doted on her only son. >> it might be trite to say this but she loved him more than life itself. he was the center of her universe. >> reporter: so after what happened, mark flew out to california right away to comfort charlie and fred. and to make funeral arrangements for his only sister lynn. and at the very same time, as if in another world altogether, detective richard birdsaw poked around this burglary gone bad. he could perhaps write up a report, be done with it, make the bad press go away. but no, richard was a troubled man. >> usually, we know something's wrong. my partner and i just feel something's wrong but we don't know