The brave eight-year-old raced after the kidnapper. She wouldn't let him get away with her baby brother.
Not far behind was her older brother, a 10-year-old boy in hot pursuit with the baby's stroller.
Now the Wright siblings are being credited with doing the right thing by thwarting the kidnapping of their little brother in Sprague, Washington.
Delicia and her big brother Brenden were playing in a park near their babysitter's house with their baby brother Owen, who is just 22-months-old.
The kidnapper grabbed little Owen and took off. A surveillance camera outside a grocery store captured the frightening figure running down the street.
Delicia screamed and took chase, drawing the attention of some teens.
One teen told INSIDE EDITION: "It really turned into blood-curling screaming."
Another added: "When you kind of pick up there's a girl running behind him, he's running down an alleyway with a kid - things don't look right."
In a 911 call, a caller told the dispatcher: "A man grabbed a two-year-old baby child, and was running with it. The little kid started screaming."
The kidnapper eventually put Owen down in a vacant lot before escaping.
Kathleen Baty, the personal safety expert known as 'The Safety Chick,' says making a racket is exactly the thing to do in such an emergency.
Baty told INSIDE EDITION: "Using your voice. Using your words. Screaming, yelling, 'Help!' 'Stranger danger!' 'This is not my father!' Can be the real difference between life and death."
She added: "Instilling your kids that when they are out in the public that if some adult comes up to them they need to have that gut reaction and go the other way and yell and scream as loud as they can."