By J.D. Miles, CBS 11 News

DALLAS (CBSDFW.COM) – The mother of an 11-year-old boy who accidentally shot and killed his 8-year-old friend while playing with a gun at her apartment was arrested and charged Wednesday in connection with the boy’s death.

Stacy Maloney and Adrian Robinson, who shared the apartment with Maloney, were booked into the Lew Sterett Justice Center Wednesday after telling investigators they left four children unsupervised in their North Dallas apartment on Jan. 13.

Maloney’s 11-year-old boy pulled a 12-gauge shotgun from a closet and fired it, shooting 8-year-old Keivion Johnson in the face, killing him. Another 8-year-old boy was shot in the leg and injured.

Maloney, 30, and Robinson, 28, were each charged with unlawful possession of a firearm by a felon, a third-degree felony that could bring a sentence of up to 10 years in prison. Maloney was also charged with making a firearm accessible to a child.

“If justice has to be served, justice has to be served,” said Alonzo Stewart, father of the injured child. “I’m not saying lock him up for life, but something’s got to be done.”

Police initially labeled the shooting an accident and did not press charges for more than a week after the incident.

The victim’s parents broke down during a public memorial for their son, but have yet to speak about Keivion’s death. They declined to comment about Wednesday’s arrest. Maloney and Robinson also declined comment.

Child Protective Services is continuing to investigate the couple. A Grand Jury could still choose to file additional charges against Maloney and Robinson.