Complex sentence: The victims who fail these "tests" all have a jigsaw piece cut out of their bodies, which earned the killer the alias "The Jigsaw Killer" by newspaper writer Oswald Mcgullicuty.
Split into simpler sentences: The victims who fail these "tests" have a jigsaw piece cut out of their bodies. This has earned the killer the alias "The Jigsaw Killer" by newspaper writer Oswald Mcgullicuty.