Complex sentence: When Dr. John rejects Chucky's plea for help, Chucky fatally wounds Dr. John using his personal doll with a voodoo knife and escapes just before Karen and Detective Norris arrive on the scene.
Split into simpler sentences: When Dr. John rejects Chucky's plea for help, Chucky fatally wounds Dr. John using his own voodoo doll and a knife. Chucky escapes just before Karen and Detective Norris arrive on the scene.