Juanly Pena, 14, charged with shooting his 9-year-old brother to death in February, will be tried in open court and, if convicted could face the same prison sentence as an adult, the Suffolk County District Attorney's office reports

Pena was arraigned in Boston Juvenile Court this morning on charges of manslaughter and unlawful possession of a firearm for the death of his brother Janmarcos Pena, the DA's office says. He was ordered held in lieu of $50,000 bail.

The DA's office provided this account: