Now Playing: Kansas City girl in car accident awakens from coma

Now Playing: Mom who had COVID-19 and gave birth in coma finally reunited with her baby

Now Playing: Analyzing Day 11 of Chauvin trial testimony

Now Playing: Young adult book 37 years in the making becomes bestseller

Now Playing: Georgia State Rep. Park Cannon discusses arrest, new voting law

Now Playing: Are companies backing up their eco-friendly claims?

Now Playing: The Rundown: Top headlines today: April 12, 2021

Now Playing: By the Numbers: The evolving American family

Now Playing: Legal expert: George Floyd’s brother helped ‘humanize and give life’ to Floyd

Now Playing: Sen. Tina Smith: ‘Traffic stops like this should not result in somebody’s death’

Now Playing: Officer fired after drawing gun on Army lieutenant

Now Playing: 1 dead after police-involved shooting in Knoxville high school

Now Playing: Teacher gives classroom pep talks to 3rd graders

Now Playing: Biden makes historic nomination for Army secretary

Now Playing: Alarming rise of COVID-19 cases, more deaths

Now Playing: Shooting at Tennessee high school leaves 1 dead, officer injured

Now Playing: George Floyd’s brother testifies at Derek Chauvin’s trial

Now Playing: Minnesota officer fatally shoots 20-year-old Daunte Wright

Now Playing: The Death of George Floyd: Day 11 recap of Derek Chauvin's trial

Now Playing: 1 dead, officer injured in Knoxville shooting