CHICAGO HEIGHTS - A 15-year-old boy was charged with involuntary manslaughter Monday after police said he accidentally shot a four-year-old relative with a service revolver belonging to her mother, who is a corrections officer.

Jalynn Hall died Sunday morning at St. James Hospital and Health Centers in Chicago Heights after she was shot in the chest.

Police said Jalynn and the teen, who was charged as a juvenile and is not being named, were handling the 9 mm gun belonging to her mother, a Cook County sheriff's corrections officer.

The woman was at work when the shooting occurred. She has been relieved of police powers while authorities investigate how the children got her weapon, said Cook County sheriff's police spokeswoman Penny Mateck. Corrections officers are not allowed to bring their guns to work inside the jail complex, she said.

Family attorney David McDermott said the shooting was "nothing short of an accident."

"This is a good boy, a good family and they are again just having a difficult time mourning the loss," McDermott said.