Now Playing: Identical twin sisters give birth to daughters on the same day

Now Playing: Genealogy test leads to arrest in 2001 murder, police say

Now Playing: News headlines today: Nov. 6, 2018

Now Playing: Tip line established amid desperate search for abducted 13-year-old girl

Now Playing: Voters to elect senator, governor in Florida

Now Playing: How people are helping others get to the polls

Now Playing: USOC moves to take over USA Gymnastics in wake of sexual abuse scandal

Now Playing: Single mom almost missed out on $350M Powerball jackpot

Now Playing: Daylight saving time, marijuana legalization among ballot initiatives

Now Playing: On the ground at the polls: Pennsylvania, Texas, Georgia

Now Playing: New concerns about election security as voters head to the polls

Now Playing: What’s at stake and the battleground states to watch

Now Playing: Severe storms targeting South, East on Election Day

Now Playing: Trump delivers closing message ahead of midterm elections

Now Playing: Salmon swim across flooded roadway

Now Playing: Single mother in Iowa comes forward as Powerball winner

Now Playing: 2 former day-care teachers charged with child endangerment

Now Playing: Hours after saying ‘I do,’ newlyweds killed in helicopter crash

Now Playing: Major storm, tornado watches could affect voter turnout on Election Day

Now Playing: McCaskill fighting tooth and nail to hang onto Missouri Senate seat