Everything we know so far about the murder of Charlie Kirk

• Charlie Kirk, chief executive and co-founder of the conservative youth organisation Turning Point USA, was shot dead at an event at Utah Valley University.
• Authorities stated that a single shot was fired from a roof while Kirk was speaking, and officials believe the assailant acted alone.
• A “person of interest” has been taken into custody, though no charges have been announced, and the university campus was evacuated and closed.
• Kirk, 31, was a prominent podcaster and ally of US president Donald Trump, and his organization significantly expanded its reach on campuses during Trump's political rise.
• The killing has drawn bipartisan condemnation, with Trump ordering flags lowered to half-mast and describing Mr Kirk as a “great guy.”