Pennsylvania authorities have arrested a mother for allegedly abusing her son during a shopping trip to the local Walmart. Samantha Fletcher is accused of violently "slamming" the boy into a shopping cart on Saturday, March 14, knocking the crying child unconscious. Fletcher, 28, is currently facing single counts of aggravated assault, endangering the welfare of children, recklessly endangering another person, and simple assault in connection with the alleged abuse. Several shoppers at the Tullytown store witnessed the alleged crime and called 911, police said.