Now Playing: Eric Holder Visits Ferguson, Missouri

Now Playing: US Attorney General Meets with FBI Agents Conducting an Investigation in Ferguson

Now Playing: Friend of Officer Darren Wilson: 'I Can Never Imagine Him Shooting Anybody'

Now Playing: Search underway after triple shooting in Austin, Texas

Now Playing: US reeling amid rise in mass shootings

Now Playing: Derek Chauvin trial set for closing arguments

Now Playing: Complex and conflicted emotions tied to Biden's Afghanistan withdrawal announcement

Now Playing: 'Congress has taken no significant action' to address epidemic of gun violence: Karl

Now Playing: 'If Derek Chauvin is not held accountable,' we could see frustration: Chief Armstrong

Now Playing: CPSC issues warning about Peloton treadmills

Now Playing: 'On Friday we should have an answer' on lifting J&J suspension: Fauci

Now Playing: Exclusive: Blinken defends Biden's refugee cap and Afghanistan exit

Now Playing: As businesses reopen, some restaurant owners face staffing shortages

Now Playing: Best friends celebrate Ivy League college acceptances

Now Playing: US emergency rooms are seeing a 6% increase in coronavirus patients

Now Playing: Closing arguments in Derek Chauvin trial begin tomorrow

Now Playing: Family of 13-year-old shot by police continue to grieve

Now Playing: Indianapolis community mourn victims of mass shooting

Now Playing: A traffic stop 'should not end with a death sentence' for Black people: Crump

Now Playing: Family of Adam Toledo speaks out