Wednesday, June 27, 2018

Detectives Arrest Two Teens in Silver Spring Homicide; Arrest Warrant Issued For Third Teenage Suspect

Updated January 15, 2019: The third suspect wanted in connection with this 2018 homicide is now in custody in Georgia. Eighteen-year-old Francisco Sosa, of no fixed address, was arrested in Gwinnett County and is awaiting extradition to Prince George’s County.

 Bryan Mancias-Callejas

Lenin Mancias-Callejas

Francisco Sosa
Homicide Unit detectives arrested two teens in connection with a fatal stabbing in Silver Spring in May. The suspects are 16-year-old Lenin Mancias-Callejas and 16-year-old Bryan Mancias-Callejas, both of the 8400 block of Hill Road in Hyattsville. Detectives also obtained an arrest warrant for a third suspect. He’s identified as 18-year-old Francisco Sosa of no fixed address. They are all charged with the fatal stabbing of 19-year-old Herson Mejia-Alvarez of 67th Avenue in Riverdale.

On May 23rd, at approximately 12:50 pm, officers were in the area of the 8900 block of New Hampshire Avenue when they discovered Mejia-Alvarez in a wooded area. Detectives began a death investigation. The following day, the medical examiner ruled the cause of death blunt force trauma and the manner was homicide.
The preliminary investigation reveals this was a gang-motivated murder. The three suspects are members of a gang.

All three suspects are charged with first and second-degree murder and other related charges. The Mancias-Callejas brothers are in the custody of the Department of Corrections on a no-bond status.  We are actively searching for Sosa.

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), or go online at, or use the “P3 Tips” mobile app (search “P3 Tips” in the Apple Store or Google Play to download the app onto your mobile device.)

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