Police seek 14th suspect in Guzman-Feliz's murder

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Frederick Then (Via NYPD)

The NYPD has released the name and photo of a man that detectives are looking for in connection with the murder of a Bronx teen.

Police want to question Frederick Then, 20, in relation to the stabbing and beating of Lesandro "Junior" Guzman-Feliz. The NYPD described Then as 6 feet 1 inch tall and weighing 150 pounds.

Authorities have charged 13 reputed members of the Trinitarios gang in Junior's murder. Bronx DA Darcel Clark has said that warring factions within the gang apparently led the members to wrongly target Junior, who had no ties to any gang activity and was in the NYPD's Explorers program.

They attacked Junior, 15, at a bodega, dragged him outside, and stabbed and slashed him on June 20, police said. He stumbled to a nearby hospital where he collapsed and died.

If you know where Frederick Then is or have any other relevant information, you can contact the NYPD's Crime Stoppers at 800-577-8477 (English), 888-577-4782 (Spanish), or www.nypdcrimestoppers.com.