Complex sentence: The youths dragged him out and crushed his skull with nearby paving stones; when police arrived, the man was surrounded by a crowd of 100 chanting "Let him die" while lying in a coma from which he never recovered.
Split into simpler sentences: The youths dragged him out and crushed his skull with nearby paving stones. When police arrived, the man was surrounded by a crowd of 100 chanting "Let him die" while lying in a coma from which he never recovered.