Ranier Sanchez, of 183 Cedar St., was charged with second-degree attempted robbery, second-degree attempted robbery with a physical injury and criminal impersonation.
He is scheduled for arraignment Tuesday in First District Court in Hempstead.
His arrest follows the arrest of an accused accomplice.
Police said Kenny Candelaria, 17, of 1907 Byrd Dr. in East Meadow, was arrested Oct. 7, one day after the alleged attack and robbery attempt, and charged with second-degree attempted robbery. He was arraigned Oct. 8, police said. Details of his arraignment were not available.
Police said the robbery attempt occurred about 7 p.m. Oct. 6 at McVey Elementary School on Devon Street in East Meadow. It was then, police said, that Sanchez and Candelaria approached the 17-year-old boy -- and demanded he empty his pockets. During the robbery attempt, police said, Sanchez pulled out a "small badge" and identified himself as a Nassau County police officer. The victim ran, police said, but the two assailants chased him, Sanchez tripping the teen, then pulling his shirt over his head.
Police said the victim was then punched and kicked, before escaping.
He later refused medical attention, police said.