8-year-old David Young, of Cedar Falls, Iowa, was with his family at the Black Hawk Park firing range. He wandered across the firing line and was unintentionally shot in the head by his 5-year-old sister with a .22-caliber rifle.
At first officials thought it was a minor injury with an entrance and exit wound. But later at the hospital doctors discovered a lump on another part of his head and suspected the bullet fragmented and part of the projectile went deeper than first thought.
David was flown to Iowa City and taken to the Brain Trauma Unit. His conditions wasn't available.
Officials plan to meet at the sheriff's office to review safety at the range in light of the incident.