Maryland 14-year-old charged as adult in murder of infant sister

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(CBS) LANHAM, Md. A 14-year-old boy has been charged with first-degree murder after admitting to police that he beat and smothered his 7-month-old sister while his mother worked a night shift Thursday evening into Friday morning, reports CBS DC.

Johnathan Aguiluc is being held without bond and is due in a Rockville courtroom Monday. Authorities say he was charged as an adult. A preliminary hearing in the case is scheduled for Feb. 22.

The station reports that police say Gloria Yanes, 39, went to work at 10:30 p.m. Thursday evening and when she returned home the next morning, saw that her daughter, Larissa Yanes, appeared to be sleeping in a car seat.

Shortly after 6:00 a.m., Yanes reportedly attempted to wake the baby to feed her and found her unresponsive. The little girl later died at the hospital.

Detectives who interviewed Aguiluc reportedly say he admitted to beating his sister, which made her cry, then covered her mouth and nose area with his hands until she stopped crying.

The investigation is ongoing.