Michael K. Williams, the actor who brought a hard-edge charisma to his portrayal of Omar Little, the sawed-off-shotgun-wielding stickup man on the pioneering HBO series ¡°The Wire,¡± was found dead Monday in his home in the Williamsburg neighborhood of Brooklyn, the police said. He was 54.

His longtime representative, Marianna Shafran, confirmed the death in a statement and said the family was grappling with ¡°deep sorrow¡± at ¡°this insurmountable loss.¡±

Williams was found at about 2 p.m., according to the New York City Police Department. The death is being investigated as a possible drug overdose, and the city¡¯s medical examiner will determine the cause.