William O. Douglas,
Sibron v. New York — Concurrence
“ This time he saw a tall man tiptoeing away from the alcove, followed by appellant, toward the stairway. Lasky came out of his apartment, slammed the door behind him, and then gave chase, gun in hand, as the two men began to run down the stairs. He apprehended appellant on the stairway between the fourth and fifth floors, and asked what he was doing in the building. Appellant replied that he was looking for a girl friend, but refused to give her name, saying that she was a married woman. Lasky then 'frisked' appellant for a weapon, and discovered in his right pants pocket a plastic envelope. ”
