Now Playing: These are the 25 most famous women athletes in the world right now

Now Playing: Town gets hacked, triggering 'zombie' warning

Now Playing: 'American Idol' runner-up and winner reveal relationship

Now Playing: Bishop describes powerful sermon at Harry, Meghan's wedding

Now Playing: Police deliver fawn via c-section after doe left to die

Now Playing: Parents take 30-year-old son to court to get him to move out

Now Playing: Toxic cloud prompts warning in Hawaii volcano emergency

Now Playing: Olympian sues USA swimming over alleged sexual abuse cover-up

Now Playing: Manhunt underway after cop killed in line of duty

Now Playing: Schools face threats after deadly high school shooting

Now Playing: Scratch-and-sniff stamps are coming to a post office near you

Now Playing: New eruption from Kilauea in Hawaii

Now Playing: 'Start Here' podcast: Active-shooter scenarios on the rise

Now Playing: Texas school shooting survivors on what happened when alleged gunman opened fire

Now Playing: Lava flows into the ocean, causes toxic plumes

Now Playing: Blind, elderly horse rescued after falling into 8-foot well

Now Playing: DNA tests underway to confirm captured cougar attacked bikers

Now Playing: NYPD investigating chef in connection with 2 sexual assault allegations: Sources

Now Playing: Woman says she was stopped, questioned by Border Patrol after speaking Spanish

Now Playing: In Hawaii, 'laze' being created by steady flow of lava entering the ocean