NEW YORK (CBSNewYork) – Police have released surveillance images of another suspect they’re looking for in the stabbing death of 15-year-old Lesandro “Junior” Guzman-Feliz last month.

The images also shows two cars believed involved in the crime, a white Acura and a black Acura.

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On Tuesday, two accused gang members, Diego Suero and Gabriel Ramirez Concepcion, entered pleas of not guilty.

Police sources say Suero is the local leader of the “Trinitarios” gang.

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He’s accused of ordering the murder of Guzman-Feliz on June 20 in what police say was a case of mistaken identity.

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The killing of Guzman-Feliz has sparked outrage across the community and law enforcement, including a #JusticeForJunior online campaign.