16-year-old faces adult 1st-degree murder charges in officer's slaying

Authorities said her bodycam showed a vehicle allegedly driven by the teen striking the officer.
1:42 | 05/22/18

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Transcript for 16-year-old faces adult 1st-degree murder charges in officer's slaying
There are also new developments tonight after that female police officer was killed in Baltimore county, Maryland. Tonight, authorities say a teenager ran her over. Officer a Amy Caprio was called to the scene of a suspected robbery, and tonight, several suspects are under arrest. ABC's David Kerley is at the scene. Reporter: Officer Amy Caprio's alleged killer, a 16-year-old Baltimore teenager, facing adult first degree murder charges tonight of mowing her down with a vehicle. Prosecutors say dwanta Harris was waiting in a stolen jeep while three others allegedly burglarized a home. When Caprio arrives, the jeep flees, but it's a cul-de-sac. The officer chases. Exits her vehicle. Her body camera showing the jeep accelerating, according to police, and striking her violently. Harris captured quickly. No stranger to police, charged with up to a half-dozen car thefts in five months, violating house arrest. Called a one-man crime wave. Did system not work? It sounds like that it could have worked better in this particular case. This 16-year-old perhaps shouldn't have been out. Reporter: The nearly four-year veteran officer leaves behind a husband. She was recently named officer of the month. She was the kind of that was going to go up in this organization and lead. At some time in the future, she would be a leader here. Let's get to David Kerley, live from the crime scene tonight. And David, the teenager could face life in prison without parole, we know, if convicted, but so could his accomplices? Reporter: That is true, David. If they are charged with felony murder and tried as an adult, they, too, could face life in prison. David? David Kerley live in Maryland tonight. Thank you.

This transcript has been automatically generated and may not be 100% accurate.

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