Brooklyn prosecutors applied an incorrect definition of what constituted “school grounds,” according to a judge who found faulty a charge for possession of a weapon on school grounds.

After prosecutors presented a grand jury with evidence that Barsheen Wright possessed a loaded gun within 1,000 feet of a school, Wright was indicted on counts including unlawful possession of marijuana, resisting arrest, weapon possession and criminal possession of a weapon on school grounds, pursuant to Penal Law 265.01-a.