a mass shooting and then suicide
... that three days before committing a mass shooting and then suicide at Umpqua Community College, Christopher Harper-Mercer reportedly uploaded a documentary on the Sandy Hook Elementary School shooting?
... that three days before committing <b id="mwCQo"><a class="mw-redirect" href="./Umpqua_Community_College_shooting" id="mwCQs" rel="mw:WikiLink" title="Umpqua Community College shooting">a mass shooting and then suicide</a></b> at <a href="./Umpqua_Community_College" id="mwCQw" rel="mw:WikiLink" title="Umpqua Community College">Umpqua Community College</a>, Christopher Harper-Mercer reportedly uploaded a documentary on the <a href="./Sandy_Hook_Elementary_School_shooting" id="mwCQ0" rel="mw:WikiLink" title="Sandy Hook Elementary School shooting">Sandy Hook Elementary School shooting</a>?