her murder
... that Alexis Sharkey's last Instagram post before her murder documented her travels to Tulum, Mexico?
... that Alexis Sharkey's last <a href="./Instagram" id="mwBHo" rel="mw:WikiLink" title="Instagram">Instagram</a> post before <b id="mwBHs"><a class="mw-redirect" href="./Murder_of_Alexis_Sharkey" id="mwBHw" rel="mw:WikiLink" title="Murder of Alexis Sharkey">her murder</a></b> documented her travels to <a href="./Tulum" id="mwBH0" rel="mw:WikiLink" title="Tulum">Tulum</a>, Mexico?