Sentence:  The killer , if in our present group , would certainly be interested in <WSD>knowing</WSD> that much , and even though with the fingerprint 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:  be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about