NEW : New York City Officer Luis Tejada pleads not guilty to robbery , drug charges . He is accused of leading a gang that robbed drug dealers of cash , inventory . He had committed more than 100 robberies since 2001 , officials say .
NEW : New York Police Officer Jose Tejada pleads not guilty to robbery , drug charges . He is accused of leading a crew that robbed drug dealers of money , inventory . Crew had committed more than 100 robberies since 2001 , officials say .