Now Playing: Man battling rare neurological disorder surprises the mother of his 3 children

Now Playing: Prosecutors implicate Trump in 2 crimes linked to 2016 campaign

Now Playing: Police search for a possible serial arsonist in Washington state

Now Playing: 2 criminal investigations after 6 killed during concert in Italy

Now Playing: Search continues for Colorado mom missing since Thanksgiving

Now Playing: Tension grows between China and US after arrest of Chinese CFO

Now Playing: Monster winter storm hits the Southeast

Now Playing: Man charged with the kidnapping and murder of a 13-year-old student

Now Playing: Trump fires back at prosecutors investigating his presidency

Now Playing: Massive storm system sweeping across the South

Now Playing: Angry protestors take to the streets in Paris again

Now Playing: John Kelly set to leave the White House

Now Playing: Urgent manhunt for an inmate on the run in Mississippi

Now Playing: 6 dead in a stampede at an Italian night club

Now Playing: Bizarre teacher forcibly cuts student's hair while singing the national anthem

Now Playing: Pancho Claus shows the spirit of Christmas to children in need in his community

Now Playing: Home surveillance shows child stealing package from stoop

Now Playing: Police searching for missing armored truck driver, money

Now Playing: Recall involving blood pressure medications expanding

Now Playing: USSS bids farewell to former President George H.W. Bush