A Philadelphia woman pleaded guilty to involuntary manslaughter Thursday in the April death of her 11-year-old daughter, who was shot by her 2-year-old brother with a gun her mother kept in the house.

Tiffany Goldwire, 31, of West Philadelphia, had told her older son, a 14-year-old, to put the loaded .357 revolver in a safe place, according to police.

Prosecutors say the 2-year-old found the handgun under a bed and fatally wounded his sister, Jamara Stevens, who was in the bedroom texting a friend.

Police found powder burns on the boy's hands.

Goldwire's lawyer, Eugene Tinari, said that because the gun had been cocked, it required little force to pull the trigger.

Tinari called the shooting an "indescribable tragedy" and said he would ask for leniency to "allow this family to put, as much as they possibly can, this tragedy behind them."

Goldwire remains behind bars.

Her four surviving children are staying with relatives.