A Gwinnett County man is in custody Wednesday accused of slapping a stranger’s crying toddler in a Stone Mountain Wal-Mart. Witnesses say that Roger Stephens, 61, warned the mother of the child that he would “shut up the crying child if she couldn’t,” WSB-TV is reporting. Stephens is accused of slapping the 2-year-old multiple times in the face and then walking away. A bystander held Stephens until store security came to assist, according to the story.