The father of an Arizona woman who was captured and killed by Islamic State militants took the stage at Saturday's Donald Trump rally in Phoenix.
Carl Mueller received resounding applause after telling attendees he voted for the Republican presidential candidate.
Watch his emotional speech in the player above.
Mueller's daughter Kayla was captured by ISIS in August 2013 after leaving a Doctors Without Borders hospital in Aleppo, Syria.
The 26-year-old was held for 18 months.
Her family and the Obama administration confirmed her death in February 2015.