Mother pushing 3-month old in stroller shot dead on NYC Upper East Side: New details

Police are searching for a suspect in the fatal shooting of a 20-year-old mother who was pushing her 3-month-old baby in a stroller on the streets of the Upper East Side of Manhattan in New York City. The suspect came up from behind the woman and shot her once in the head at close range, police said. A child who was playing in a nearby park witnessed the shooting.