More than 30 hours after a fatal shooting that has shaken the United States, the federal manhunt for US conservative activist Charlie Kirk’s killer is intensifying.

Kirk died shortly after being rushed to hospital on Wednesday with a gunshot wound to his neck.

On Thursday, authorities released photographs and video footage showing a “person of interest” racing across a university rooftop from which the fatal shot is believed to have been fired. The suspect has not yet been identified.

Here is what we know about the latest in the investigation and Kirk’s killing :

What do we know about where the killer is now?

The suspect, who fatally wounded Kirk with a single gunshot while he was speaking to a crowd of more than 3,000 people at an event at Utah Valley University (UVU) on Wedn

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