Complex sentence: Burke says that he and Ben Foley (Kevin Tighe), the mine manager killed and buried Warden, but when Axel, Tom, and Sarah go to the burial spot, Warden's body is no longer there.
Split into simpler sentences: Burke says that he and Ben Foley (Kevin Tighe), the mine manager, killed and buried Warden. But when Axel, Tom, and Sarah accompany them to the burial spot, Warden's body is no longer there.