The 14-year-old Silver Spring boy charged with killing his infant sister will be tried in juvenile court.

Jonathan Aguilac was charged with second degree murder in the death of his 7-month-old sister. The court determined Friday he would be tried as a juvenile, said Ramon Korionoff, the public affairs director for Montgomery County State's Attorney's Office.

Aguilac killed his sister Larissa Yanes while she was under his care on the night between Feb. 8 and Feb. 9 in their apartment on the 11600 block of Lockwood Drive. Their mother, 39-year-old Gloria Yanes was at work.

Aguilac was initially charged as an adult.

During a bond hearing in February, detectives said the teen told police he had beaten his baby sister. He said he put his hand on his sister's nose and mouth because she was crying.

The infant died from suffocation.

Korionoff said Aguilac is currently in jail.