Now Playing: Judge denies bond for man accused of killing pregnant wife, daughters
Now Playing: Suspect arrested in case of missing Iowa student Mollie Tibbets
Now Playing: Father in custody after 2 sons drown in river
Now Playing: Florida police searching for man seen on camera setting car on fire
Now Playing: Father dances with 2-year-old daughter after she undergoes chemotherapy
Now Playing: Surveillance video shows woman dragged, run over during robbery
Now Playing: Police helicopter crashes at training facility
Now Playing: News headlines today: Aug. 22, 2018
Now Playing: Houston bank employee charged with robbery for role in violent attack
Now Playing: Colorado man faces 9 felonies for alleged murders of pregnant wife, daughters
Now Playing: Undocumented immigrant charged with murder of missing Iowa woman
Now Playing: Video shows crash of police helicopter in Arkansas
Now Playing: Hurricane Lane strengthens to Category 5 storm as it nears Hawaii
Now Playing: St. Jude staff provides ‘no more chemo’ party for Memphis girl
Now Playing: Train derailment prompts evacuations in California
Now Playing: NYC police search for a mystery gunman who opened fire in high rise luxury apartment
Now Playing: Asia Argento responds to sexual assault allegation
Now Playing: Man accused of killing pregnant wife, daughters formally charged with murder
Now Playing: Arrest made in disappearance of Iowa jogger
Now Playing: Paul Manafort found guilty on 8 counts; mistrial on 10
Read More