Now Playing: Vanished: The Case of Missing Lindsey Baum

Now Playing: The Search for Missing Mom Susan Powell

Now Playing: Australian woman fatally shot by Minneapolis police

Now Playing: White House faces new questions on Russia investigation

Now Playing: Trump hits record low approval rating in new poll

Now Playing: All eyes on Wall Street after record high

Now Playing: Roger Federer wins record-setting 8th Wimbledon title

Now Playing: Arizona flash flood leaves at least 9 dead

Now Playing: Vigil held for 4 men found dead on Pennsylvania farm

Now Playing: Massive Florida sinkhole destroys homes

Now Playing: HBO's website crashes amid 'Game of Thrones' premiere

Now Playing: Family seeks answers after daughter dies at Mexico resort

Now Playing: US doctor evaluates baby Charlie Gard in London

Now Playing: New details emerge in deadly Honolulu apartment fire

Now Playing: 1st look at the must-have toys for the holiday season

Now Playing: Spotlight returns to husband of missing Florida mom

Now Playing: Mena Massoud cast as Aladdin in upcoming Disney film

Now Playing: D23 Expo gives fans a sneak peak at new 'Star Wars', Marvel films

Now Playing: 13-year-old Brighton Zeuner youngest winner of X Games gold

Now Playing: GOP delays health care vote due to McCain surgery