When Detective Ryan Salmon happened upon the scene of an accident in Takoma, Washington, he found the service dog for a wheelchair bound girl lying injured after being hit by a car that fled.

The policeman brought the dog, named Spice, which had leg fractures, to the veterinary hospital.

So he "did the right thing" and told the vet to send him the $200 bill.

The girl's mother was astounded that a total stranger would do such a wonderful thing.

(WATCH the video below, or READ the story from KIRO-7)