Now Playing: 'Bachelorette' alum Tyler Cameron talks new book

Now Playing: Britney Spears' lawyer files to remove father from conservatorship

Now Playing: Simone Biles out of gymnastics team finals at Olympics

Now Playing: California teen attacked by crocodile in Mexico

Now Playing: ‘Fake Uber’ murder trial wraps up

Now Playing: Delta variant prompts new vaccine mandates

Now Playing: States announce vaccine mandates for government employees

Now Playing: Historic hearings on Capitol riot begin today

Now Playing: Biden: US will conclude combat mission in Iraq

Now Playing: Special House committee on Capitol riot to hold 1st hearing

Now Playing: Liz Cheney talks ahead of 1st committee hearing on Capitol Riot

Now Playing: 23-year-old woman who had 7-pound cyst removed encourages others to 'see a doctor'

Now Playing: In states with highest COVID-19 rates, calls to get vaccinated and survivor regret

Now Playing: Olympics athletes compete for glory amid controversy over COVID-19 pandemic

Now Playing: ABC News Live Prime: Monday, July 26, 2021

Now Playing: Music producer legends 'Jimmy Jam' and Terry Lewis on legacy and future

Now Playing: Trump ally Tom Barrack pleads not guilty in illegal lobbying case

Now Playing: The Rundown: Top headlines today: July 26, 2021

Now Playing: By the Numbers: The Jan. 6 Capitol insurrection

Now Playing: Nation under fire: Chronicling 1 week of gun violence in America