Now Playing: Driver hit and run in Wilmington

Now Playing: Hit-and-run caught on camera in Los Angeles

Now Playing: Police searching for driver in hit-and-run rollover crash

Now Playing: Rescue crews search underway in deadly California flooding

Now Playing: Saluting the American heroes in Vietnam

Now Playing: 5-year-old mauled by a pitbull at Portland airport

Now Playing: Luke Perry hospitalized due to unknown medical issue

Now Playing: Patriots owner Robert Kraft enters plea

Now Playing: Video released of Wisconsin’s largest traffic wreck

Now Playing: Virginia’s first lady, Pam Northam, under fire

Now Playing: Trump and Kim Jong Un fail to reach agreement during summit

Now Playing: Trump intervened for Jared Kushner to receive top-secret security clearance: Report

Now Playing: A sneak peek at Disney’s new Star Wars theme park set to open summer 2019

Now Playing: My time with Rosa Parks: reporter’s notebook

Now Playing: Cohen continues Day 3 of testimony, admits to years of lying to protect Trump

Now Playing: Baby boy, 6-year-old girl among 4 dead in apparent murder-suicide at Illinois home

Now Playing: Nurse adopts sweet baby she cared for in pediatric ICU

Now Playing: What Sarah Stern’s friend says happened to her body after she was killed

Now Playing: The moment Sarah Stern’s childhood friend confesses to knowing who killed her

Now Playing: Sarah Stern’s dad’s message for convicted killer: ‘Go to jail, don’t ever come out’