This program does not distribute an official ChangeLog file. You
can generate one from the subversion repository though using the
following command:

    svn log http://svn.sleuthkit.org/repos/sleuthkit/

For a specific release, try something like:

    svn log http://svn.sleuthkit.org/repos/sleuthkit/tags/sleuthkit-3.0.0

and replace 3.0.0 with the version you are interested in.