Now Playing: Police search for valuable monkey stolen from zoo

Now Playing: Pet monkey gets loose, attacks Home Depot worker

Now Playing: Rare baby monkey makes debut at New Orleans zoo

Now Playing: How NYC police's relationship with LGBTQ+ community changed after Stonewall Uprising

Now Playing: Remembering 1969 Stonewall Rebellion participants Sylvia Rivera, Marsha P. Johnson

Now Playing: Big Freedia reflects on the meaning of the 1969 Stonewall Uprising

Now Playing: 17-year-old to graduate Harvard 11 days after graduating high school

Now Playing: These parents are tackling a common football injury that took their son's life

Now Playing: Mom graduates college after sons ask her to go

Now Playing: Spa prostitution investigation

Now Playing: Rare, high-risk tornado outbreak underway across southern Plains

Now Playing: Pair of tornadoes spotted outside Oklahoma City

Now Playing: Great white shark believed to be lurking off Connecticut coast

Now Playing: Surprise! Billionaire pledges to pay off Morehouse graduates' loan debt

Now Playing: Strangers tip helps police locate kidnapped 8-year-old girl in Texas

Now Playing: Louisiana governor set to sign bill making abortions illegal

Now Playing: Trump goes to Pennsylvania with eyes on Joe Biden, Pete Buttigieg

Now Playing: Former military veteran arrested in fatal shooting of police officer

Now Playing: 'GMA' Hot List: Billionaire tells Morehouse College grads he will pay off their debt

Now Playing: Man who allegedly urinated on child's park memorial says 'I made a huge mistake'