Claus



Klaus was a squad leader in the Umbrella Biohazard Countermeasure Service. He and his team were sent in to locate and retrieve the Umbrella Corporation scientist, Dr. Cameron. However, the team was systematically slaughtered during their search through Raccoon City. Klaus and another agent, Roger tried to escape, but it was revealed that Cameron was in fact the creature that had been stalking the squad, and that she had transferred her conciousness into Roger. The mutant scientist then killed Klaus by using tentacles to make his head explode.

Dextrocardia
Many viewers have come to the conclusion that Klaus had Dextrocardia Situs Inversus, in which the persons' Heart is on the opposite side of the body to most others. He may have even had Dextrocardia Situs Inversus Totalis, in which the entire internal body is swapped around.

This theory is due to how several of Roger/Cameron's tentacles went through where a normal heart would be, without killing him instantly.