Now Playing: Go behind the scenes of the Mega Millions drawing

Now Playing: New clues in search for 13-year-old after parents' murder

Now Playing: Hurricane Willa set to make landfall in Mexico as Cat 4

Now Playing: What to know about the new FICO system that could boost your credit score

Now Playing: Prince Harry and Meghan Markle visit Fiji

Now Playing: Amy Schumer announces she's pregnant in Instagram post

Now Playing: Coworkers form office pools for chance at $1.6B jackpot

Now Playing: Turkish President lays out what happened to Washington Post columnist

Now Playing: Elle King opens up about substance abuse, depression battle

Now Playing: Boy's 'Ghostbusters' wish comes true when entire city is transformed

Now Playing: Carla Hall shares seasonal fall recipes live on 'GMA'

Now Playing: Woman reveals she is a perfect match, will donate kidney to her neighbor

Now Playing: Trump fires up base with false claims on migrant caravan

Now Playing: Tourist allegedly murdered in Turks and Caicos

Now Playing: Elle King performs 'Shame' live on 'GMA'

Now Playing: Starbucks opens its first All Signing Store in the U.S. that caters to Deaf customers

Now Playing: Humanitarian concerns grow over exodus of Central Americans

Now Playing: Trump hits campaign trail for Republicans

Now Playing: Survivor describes horrifying moments of deadly rafting accident

Now Playing: Mega Millions jackpot reaches $1.6 billion