Sentence:  The killer , if in our present group , would certainly be interested in knowing that much , and even though with the <WSD>fingerprint</WSD> evidence what it was I could see no way he could use this bit of information to improve on his situation , there might always be some way . 
Meaning of the word marked with <WSD> tags:  a print made by an impression of the ridges in the skin of a finger; often used for biometric identification in criminal investigations