Now Playing: Ride along with Houston’s oldest rookie cop

Now Playing: Why this Olympic hopeful traded in his running shoes to serve his country

Now Playing: From truck driver to successful artist: This man quit his job to become a sculptor

Now Playing: How this ‘Wicked’ star made it to Broadway from Wall Street

Now Playing: Woman becomes Houston’s oldest rookie police officer: Part 2

Now Playing: Former stay-at-home mom enters the police academy at age 52: Part 1

Now Playing: Prince’s half-sister: ‘He wouldn’t have taken a pill like that’ if he knew

Now Playing: At home and backstage with star of Broadway’s ‘Wicked’

Now Playing: Teen taken by high school teacher on how their relationship began: Part 1

Now Playing: Teacher suspended after being reported for kissing a student in classroom: Part 2

Now Playing: Teen says teacher threatened her to get her to go on the run with him: Part 3

Now Playing: Life on the run: Teen on what happened when she left town with teacher: Part 4

Now Playing: Man tips off police about missing teen, teacher on the run: Part 5

Now Playing: Tennessee teen taken by teacher says adults failed to protect her: Part 6

Now Playing: Tennessee teen taken by teacher says he threatened her with guns

Now Playing: Retracing missing Tenn. teen, former teacher’s steps after they disappeared

Now Playing: Tennessee teen taken by teacher says he first kissed her in classroom

Now Playing: A high school cheerleader and football player’s tumultuous relationship: Part 1

Now Playing: After breakup, teen claims he was kidnapped and left in ditch: Part 2

Now Playing: Teen found dead in her bed from a gunshot to her head: Part 3