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18-year-old man charged with murder in death of girlfriend’s 3-month-old son

(Photo: Thornton Police Department)

THORNTON, Colo. — An 18-year-old man has been charged with first-degree murder in the death of his girlfriend’s 3-month-old son.

On Monday, prosecutors identified the baby as Leo Garcia.

Officers with the Thornton Police Department were called to a home in the 9000 block of Gale Boulevard on May 1, and found the baby was unconscious and not breathing.

The child was taken to a hospital where he was later pronounced dead. Hospital staff described the injuries the child suffered as “nonaccidental trauma.”

Officers arrested the mother’s boyfriend, Isaiah Marquez.

Marquez has been charged with one count of first-degree murder of a child by a person in a position of trust and one count of child abuse causing death.

A preliminary hearing is scheduled for July 7 in Adams County District Court.