Connie Villa, 35, is currently behind bars facing first degree murder charges and attempted murder charges after her 13-year-old daughter, Aniarael Macias, was found dead in the bathroom of her family's apartment last week in Casa Grande, Ariz.
Villa told police in an interview that she was "unsuccessful" in forcing her daughter to ingest prescription drugs so she suffocated her to death "with her bare hands," according to Thomas Anderson, spokesman for the Casa Grande Police Department.
Detectives also said that Villa provided a motive for the alleged killing: she did not want her ex-husband Adam Villa, 33, to have custody of the children, said Anderson.
Court documents obtained by ABC15 show that Adam filed for divorce in December 2012 stating the couple's marriage was "broken." The divorce was finalized two months ago, according to the documents.
Villa is also accused of attempting to poison her three other children by forcing them to take prescription drugs, then lured her ex-husband to her home before stabbing him multiple times in the upper torso, and then stabbing herself, said police.
Villa was arrested Sunday, Dec. 29, 2013 after being released from the hospital, said police.
The Pima County Medical Examiner's Office conducted an autopsy last week on Aniarael and found it to be inconclusive. They are awaiting the results from a toxicology, which could take a 2-3 weeks.
The Casa Grande Police Department has asked that the Medical Examiner's Office look for signs of suffocation, according to a police report.
The three children were taken to a Phoenix hospital where "trace amounts" of narcotics were found in their systems, said police. The children were released and are under the care of family members.
On Sunday afternoon, Aniarael's family issued the following statement:
Michael Macias, Ania's father, Vera Macias, Ania's grandmother and extended family, we request that the focus of this tragedy be a celebration of our precious Ania's life. She was a gentle, kind and beautiful spirit who was taken from us much too soon. Michael and his family are heartbroken. Ania was always smiling. She loved her brothers and sisters. She enjoyed spending time with her father and sister Gaby.
Adam was also treated at a local hospital and is expected to be OK.
Police said Villa will be charged with one count of first degree murder and four counts of attempted murder. Official charges are expected to be filed soon.