PENN HILLS, Pa. — A little girl was sent to the hospital after she was hit in the head by a rock while trick-or-treating in Penn Hills. According to police paperwork, a mother and her 5-year-old daughter had just left a house on Dorothy Drive when the mother felt something hit her back. When she turned around, she saw a man pick up another fist-sized rock and throw it. The second rock struck her daughter in the head. Channel 11 spoke off-camera to a woman at the home the pair had just left. She described the throw as hard and...