Transcript for Fast-thinking police officer saves choking baby
We're going to turn now to a baby rescue caught on camera. A quick-thinking police officer saved a 9-month-old baby who was choking. Will reeve is here with the story. Good morning, will. Reporter: George, this video is simply incredible. This officer was in the right place at the right time, and as you'll see, he had the right training. My daughter is choking. Reporter: Caught on camera, the terrifying moment a baby begins to choke on a piece of I was in shock. I was afraid. I didn't know what the outcome was going to be. 911, may I help you? Reporter: The frantic 911 call coming in late afternoon yesterday. L.A. Officer Brian cappell responding to the call was just down the block. The little girl's sister guiding him to the scene as they rush to save 10-month-old Harley Lockridge. My daughter actually ran down the street to him and she ended up making contact with him. He ran back. She's the real hero. She got me and told me where her sister was. Reporter: Her mother seen here, helpless in the front seat of her car. I don't know. She's, like, not breathing. She was struggling for air. She was struggling to breathe. Reporter: You could see the moment the 19-year veteran leaps into action, holding the baby face down and patting the back, something cappell says he's learned in training. Okay, come on, baby. You're all right. Once I heard the baby crying, it was the best sound I've ever heard in my life. Okay, she's crying now so he's getting air. Reporter: This morning the mother of two grateful for the officer in this harrowing I am just extremely, extremely grateful and I am, like, indebted to him forever. It was amazing. It was truly amazing. This family did everything right. They knew they needed help so they called 911 right away. Harley's grateful mother says that when she heard that cry it was like the sound of an angel. Guys, this is such a great example of good training coming in handy that applies to everyone, not just to police officers. Thank you, will. Thank you.
This transcript has been automatically generated and may not be 100% accurate.