Passage: That night, the couple is disturbed by the sounds of their next door neighbors, the Higgins, being murdered during a home invasion. While Mia calls the police, she and John are attacked by the Higgins' killers. The police arrive and shoot one killer, a man, dead while the female killer commits suicide by slitting her throat inside the nursery while holding the porcelain doll. News reports identify the assailants as the Higgins' estranged daughter, Annabelle, and her unidentified boyfriend, both members of a cult.

Question: What did the female killer commit?
suicide