Crime scene: 162 mystery solving puzzles to find out who the murderer is

Chapter 141

In a certain place in Northeast Japan, there was a suspicious case: a murdered body was lying on the bed. When the forensic doctor inspected the scene, the blood type was tested from the pillowcase that had no blood.At first they thought it was caused by the victim's saliva and other secretions sticking to it, but after testing for antigens, they found two types of antigens, type A and type B, and they could not determine which type it was, type A, type B, or type AB. , and the victim had type O blood.The policemen racked their brains and couldn't figure it out.

One wave is not flat, and another wave rises again.In the central part of Japan, once the police detected the blood types of O, A, and B on the wheel that hit and injured someone. The car that caused the accident was caught by the police after it fled to the small road in the mountain village in panic. .This is how the same thing?Has this car been in more than one accident?

Faced with two puzzles, the police went to the Japanese Institute of Police Science to seek advice from Dr. Yamamoto, and only then did they find the answer.

Can you guess where the problem is?
[Answer] Plants also have blood types.Although plants do not have red blood, they do have substances that determine blood type.Dr. Yamamoto said that the dead body lying on the bed was covered with a pillow made of buckwheat husks. Since buckwheat contains antigens A and B, the blood type was tested on the pillow.In the car accident case, the tire ran over the plants on the mountain road, and the substance that can determine the blood type of the plant stuck to the tire.

(End of this chapter)