Teen brothers arrested in fatal gang-related stabbing in Silver Spring; 3rd suspect wanted

Bryan Mancias-Callejas, left; Lenin Mancias-Callejas, middle; Francisco Sosa, right (Prince George's County Police Department)

Two teens have been arrested in the gang-related killing of a man found dead in some woods last month, while a third suspect is still being sought.

Sixteen-year-old brothers Lenin and Bryan Mancias-Callejas were arrested and charged Wednesday with first-degree murder, second-degree murder and other related charges in the stabbing death of 19-year-old Herson Mejia-Alvarez.

Prince George's County police also searching for 18-year-old Francisco Sosa, who faces the same charges as the brothers, in the case.

Police said they found the victim's body on May 23 in a wooded area in the 8900 block of New Hampshire Avenue in Silver Spring while working an unrelated case.

The medical examiner has ruled that the victim died from blunt force trauma in a homicide.

Police said the two brothers and the third suspect are members of a gang, but haven't specified which one.

Anyone with information is asked to call the Homicide Unit at 301-772-4925. Callers wishing to remain anonymous may call Crime Solvers at 1-866-411-TIPS (8477), go online at or use the “P3 Tips” mobile app.

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