If Bauerstein's the murderer, nothing could be simpler than for him to substitute some ordinary coco for his sample, and send that to be tested. 
Bauerstein is guilty of the murder.
mnli hypothesis: Bauerstein is guilty of the murder. premise: If Bauerstein's the murderer, nothing could be simpler than for him to substitute some ordinary coco for his sample, and send that to be tested. 