Police said Connie Villa, 35, of Casa Grande, was arrested Sunday after her 13-year-old daughter, Aniarael Macias, was found dead in the family's apartment Wednesday following a call from Villa's ex-husband, Adam Villa, 33, to 911 to report he was stabbed and going to the hospital, the Arizona Republic in Phoenix reported Monday.
Investigators also determined Connie Villa tried to kill her three other children, ages 3, 5 and 8, by forcing them to ingest prescription narcotics, said Casa Grande police spokesman Thomas Anderson.
She then lured her ex-husband, the biological father of the three younger children, to the apartment and stabbed him repeatedly before he escaped, police said.
Responding officers forced their way into the home, where they found Connie Villa with apparent stab wounds to her upper torso, Anderson said. Police discovered the teenager's body in the bathroom while securing the scene.
Villa was arrested after her release from Maricopa Medical Center in Phoenix where she was being treated for what police said they suspect were self-inflicted stab wounds, the Republic said.
The teenager did not have any apparent injuries and the cause of her death was not immediately determined, Anderson said.
An autopsy conducted Saturday by the Pima County Medical Examiner's Office did not identify a cause of death so authorities are awaiting a toxicology report, the Republic said.
The three children were taken to the hospital for evaluation, where initial tests found trace amounts of opiates in their systems.