Toddler killed in Arkansas road rage incident manhunt underway 
Azadeh Ansari
The incident began Saturday evening when a motorist behind the grandmother grew agitated that she was not moving quickly enough at a stop sign, Little Rock Police Department spokesman Lt.
['The', 'incident', 'began', 'Saturday', 'evening', 'when', 'a', 'motorist', 'behind', 'the', 'grandmother', 'grew', 'agitated', 'that', 'she', 'was', 'not', 'moving', 'quickly', 'enough', 'at', 'a', 'stop', 'sign,', 'Little', 'Rock', 'Police', 'Department', 'spokesman', 'Lt.']