From the article:
The girl, whose name has not been released because she is a minor, suffered a gunshot wound to the head from a .22 caliber bullet. She remains in critical condition after surgery at OU Medical Center, according to hospital employees.
Police have identified the person who fired the shot as a 14-year-old male relative of the girl.According to another article, police suspect this is an unintentional shooting.
From a third article:
The shooting happened at a home in rural southeast Norman where the girl was staying as a guest.Every gun in the hands of a child must first pass through the hands of an adult.