What can we infer from the last paragraph
A.The defendants will confess to the crime as long as their fingerprints are detected at the crime scenes.
B.Even the fingerprints of someone were found at the crime scenes, they sometimes can’’t serve as the decisive evidence.
C.The high-tech will help the experts to determine the how long the fingerprints had been left.
D.The scene of the crime needs to be examined carefully.