According to authorities, Xavier Davis, 28, shot Harmony Carhee, 6, and her parents, Donyavia Lagway and Gregory Carhee, on June 30.
At the time, Harmony’s 10-year-old sister was also shot, but she played dead during the rampage and when the shooter left, she called her grandmother using FaceTime, police said.
The 10-year-old girl was taken to the hospital and released on July 2. She continues to recover from her injuries, police said.
The girl told police Davis knocked on the door of the house before the rampage, authorities said.
When he went into the house, officials said Davis was wearing a mask and grabbed Harmony’s 1-year-old brother by the hair, threw him and then shot the victims in the head.
Once the killer left, the 10-year-old girl grabbed her brother and locked the door, authorities said.
Grandmother Manda Lagway spoke with ABC 13 regarding her granddaughter, "She was strong. She was hurt. But my baby came out of nowhere, from whatever way she had, to make stuff happen. I just want everyone to know my baby is a hero. My baby is a hero."
The 1-year-old boy was not injured in the rampage and officials said the couple has an 8-year-old son, but he was spending the night with his uncle.
Davis was arrested on July 1 in an unrelated family violence charge, but now authorities said they charged him with three counts of capital murder.