Complex sentence: The ship's crew had been paying the girls for sex and when one of the girls refused to participate she was killed and the crewman responsible dumped her overboard and stove in the air supply on the top of the container to kill the remaining women.
Split into simpler sentences: The ship's crew had been paying the girls for sex and when one of the girls refused, she was killed. The crewman responsible dumped her overboard and collapsed the air pipe to kill the remaining women.