Now, to the teenagers who helped track down an abducted 5-year-old girl. A 15-year-old and his friend, joining a group of first responders in the search for a missing little girl in pennsylvania. And... See More
Now, to the teenagers who helped track down an abducted 5-year-old girl. A 15-year-old and his friend, joining a group of first responders in the search for a missing little girl in pennsylvania. And hunting down the kidnapper. Abc's rob nelson has their story for us. Reporter: One moment, 5-year-old joslyn rojas was playing in her lancaster, pennsylvania, front yard, thursday afternoon. And then, she was gone. It's something you don't wish on anybody. And horrible thoughts rushed through my mind. Reporter: Her mother called police. And a frantic search began. Family, neighbors and law enforcement and crews fanned out. 15-year-old tamar and friend chris were on their bikes trying to find joslyn. It was two hours when she was missing. And suddenly -- we saw the car. And the car had the little girl in it. Reporter: The two teens chased the alleged kidnapper for 15 heart-pounding minutes. If he wasn't going to stop, i was going to jump on the car. Reporter: The driver abruptly stopped and pushed her out of the car. Unharmed, she was reunited with her mother. One of the best days of my life. He's our hero. There's no words to say it. I'm so grateful. Reporter: This morning, the suspect is still at large. And police are focused on finding him. We've all heard worse stories with not so happy endings. But this would be a happier ending if we find the person responsible. Reporter: For "good morning america," rob nelson, abc news, new york.
This transcript has been automatically generated and may not be 100% accurate.