TUCSON, Ariz. -- The parents of 18-month-old twins in Tucson arrested on suspicion of child abuse now may be facing murder charges.
Tucson police said Friday that one of the injured toddlers has died.
They say the charges against 25-year-old Kristepher Benavidez and 30-year-old Monique Gaxiola could be upgraded to first-degree murder.
Tucson Fire Department personnel went to a home in response to a child not breathing call Wednesday afternoon.
They took the toddler to a hospital and police found the twin and a 7-year-old sister at a neighbor's home.
Officers say the older child appeared uninjured, but the twins had injuries that appeared non-accidental.
Detectives say it appears Benavidez had been physically abusing the twins for an unknown period.
They say Gaxiola allegedly was aware of the abuse, but didn't report it.
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