Mattapan Teen Sentenced to State Custody in Brother’s Murder

Juanly Peña, 15, of Dorchester pleaded guilty to charges of manslaughter and unlawful possession of a firearm in a Suffolk County Juvenile Courtroom Wednesday following the death of his 9-year-old brother in February 2014. On the morning of Feb. 7, the teen shot his brother, Janmarcos, with what he thought was an unloaded handgun while … Read more →

Mattapan Teen Arraigned as ‘Youthful Offender’ in Younger Brother’s Death

A 14-year-old boy charged with the February 7 shooting death of his younger brother, Janmarcos Pena, 9, in the Peña family’s home on Morton Street was arraigned as a ‘youthful offender’ last week, opening him up to adult sanctions if found guilty in the case. The teen, identified as Juanly Peña of Dorchester, pleaded innocent … Read more →

Mattapan teen accused of killing younger brother had violent history

Revelations of a violent past and connections stemming over two years with the Department of Children and Families have come to light days after a 14-year-old Mattapan teenager was accused of fatally shooting his younger brother. The unidentified youth was ordered held on bail Monday, a few hours before the Mattapan’s family involvement with the … Read more →

Juanly Pena

  • Arrested: March 31, 2014
  • Age: 15
  • Gender: Male
  • Race: Unknown

Suspected in the Feb. 7, 2014, death of Janmarcos Pena.