If Mr. Foster was murdered, what was the motive?
Motive is generally used to tie a particular defendant to a particular crime, not to determine whether a crime was committed. In this case, we have proved that a crime was committed, and covered up, but we are not in a position to prove who committed the initial crime or why. In the Watergate cover-up, there was no official conclusion about who ordered the Watergate break-in or why.