Complex sentence: Outside he was approached by another policeman posted at the temple that evening, Kanhaiyalal Dube, who wanted to calm him down, but before Dube could say a word, Sharma shot him dead.
Split into simpler sentences: Outside he was approached by another policeman posted at the temple that evening, Kanhaiyalal Dube, who wanted to calm him down. But before Dube could say a word, Sharma shot him dead.