Whack Job: A CHRONOS Story (The CHRONOS Files)

Simon Rand is well-accustomed to altering history. In fact, the CHRONOS key around his neck has allowed him to alter the timeline to include an entirely new religion--one that his grandfather, Saul Rand, claims will result in a better future than generation after generation of haphazard mistakes and blunders. But it takes an accidental jump into an infamous 1890s murder scene to show Simon the lengths to which Saul is willing to go in his quest to "fix" history.
This short story was originally published in Alt.History 102.