The mother of the 4-year-old girl who is believed to have accidentally killed herself with a gun last week has been charged with third-degree murder.

Shakeya Holmes, 25, also is facing involuntary manslaughter, endangering the welfare of children and related charges, according to court records. She was arraigned on Saturday and was being held at Riverside Correctional Facility as of Sunday.

Holmes was in her home on the 1800 block of North 20th Street on June 23 with her two daughters, ages 3 and 4, when the 4-year-old was killed by a gunshot to the eye. She is believed to have shot herself by accident after finding the gun, Philly.com reported.

Holmes was found sitting on the front steps of the home holding her daughter and weeping after 911 was called at 12:25 p.m. The girl was pronounced dead half an hour later.

However, police told Philly.com that Holmes first claimed the bullet came into the house through a window, which was quickly disproven by the bullet's trajectory. 

The gun, a .40-caliber, was found on a shelf in a closet that would have been inaccessible to a child. 

Police told Philly.com Holmes did not get medical attention right away, and was instead "covering up" the shooting after the girl's death. 

A warrant has been issued for the arrest of Holmes' boyfriend Demetrius Williams. 

Holmes' preliminary hearing is scheduled for July 13.