Michael Koomen was shot and killed
... that Michael Koomen was shot and killed while trying to calm the situation?
... that <b id="mwrQ"><a class="mw-redirect" href="./Death_of_Michael_Koomen" id="mwrg" rel="mw:WikiLink" title="Death of Michael Koomen">Michael Koomen was shot and killed</a></b> while trying to calm the situation?