MOUNT CLEMENS (WWJ) – A 64-year-old St. Clair County man is expected to turn himself in this week to face a charge involving a gun that was accidentally fired at the Gibraltar Trade Center in Mount Clemens last week.

Macomb County Sheriff’s officials said it happened during the Gun & Knife Show when a customer, believing the gun was not loaded, accidentally fired the weapon. When the owner inspected the firearm, a second shot was fired, injuring three people, including a child.

READ MORE: Police Officers, Civilian Injured By Driver On 3-Wheeled Vehicle In Detroit

All three were treated for minor scrapes at the scene.

READ MORE: Westland Police Investigating After Man Kills Ex-Girlfriend, Barricades Himself In Trailer

The gun’s owner was banned from any future Gun & Knife Shows at Gibraltar.

MORE NEWS: Whitmer Calls On Insurance Companies To Ensure Michigan Women Have Reproductive Health Coverage

If convicted, he faces two years in prison for careless discharge of a firearm causing injury.  His name has not yet been released.