Alison and John both worry about how the trauma of Lauren’s death will affect their now, 14-year-old son and also Lauren’s twin.

WATCH: ‘I Hope They Don’t Lose Hope,’ Says Mom Of Her Two Surviving Children Learning To Cope With Their Sister’s Violent Death

Just eight years old when his sister was killed by their mother’s boyfriend, this brave young man shares with Dr. Phil how he has been coping with the trauma of Lauren’s death, five years ago.

WATCH: ‘I Woke Up To The Sounds Of My Daughters Screaming,’ Says Mother Of Slain 6-Year-Old

“I just try to avoid thinking about it – and avoiding any situations where it could come to thinking about it,” says the teenager. He admits to occasionally questioning himself about what more he might have done.

He also opens up to Dr. Phil about his bond with his mom and surviving sister and the complicated relationship he has with his father.

WATCH: Dad Who Says His Alcoholism ‘Spun Out Of Control’ After His Daughter Was Killed, Claims His Ex Won’t Let Him See Their Other Kids

This episode of Dr. Phil airs Friday. Check here to find where you can watch.

TELL DR. PHIL YOUR STORY: Are you involved in a story that has made the headlines?

Estranged Exes Come Together Seeking Justice For Their Slaughtered Child