Now Playing: A look at life inside Putin's Russia

Now Playing: Man abandoned at birth by mom uses genetic genealogy to look for biological parents

Now Playing: 'Lincoln's Last Trial': How winning a murder trial helped Lincoln become president

Now Playing: 'He's the evil': Kidnap victim faces off with captor in court

Now Playing: Behind the scenes of Britain's latest obsession, the reality TV show 'Love Island'

Now Playing: 'It's fashion with protection': Bulletproof wear demand is rising, say designers

Now Playing: Colombian couple's high-end bulletproof clothing line is hotter than ever

Now Playing: 'Ballistic couture': This company sells high-end ballistic shirts, suits

Now Playing: Images show Thai boys recovering in hospital after being rescued from cave

Now Playing: Dwayne 'The Rock' Johnson on why 'Skyscraper' and its family focus was special to him

Now Playing: Divers successfully rescue 13 boys and soccer coach from Thailand cave

Now Playing: Justin Bieber confirms engagement to model Hailey Baldwin

Now Playing: Officers' body cameras capture moments before one of their own was killed: Part 1

Now Playing: A Colorado sheriff's mission after the shooting death of one of his own: Part 2

Now Playing: 'Drunk History' creators on how they came up with the idea for the show

Now Playing: Travis Pastrana will attempt stunt that nearly killed Evel Knievel

Now Playing: Effort to rescue Thai soccer teammates and coach trapped in cave continues

Now Playing: A look at the shocking investigation that put a serial killer behind bars

Now Playing: Houston police officer asks for a dance from girl in wheelchair

Now Playing: Bebe Rexha surprises students at her former high school in Staten Island