Authorities have shared their most detailed account yet of the investigation set off by the killing of American conservative activist Charlie Kirk, which concluded with a suspect surrendering to police.

Here are key details Utah County prosecutor Jeffrey Gray released about the case centering on 22-year-old suspect Tyler Robinson:

When a lone gunshot rang out during Kirk's outdoor event on September 10, a Utah Valley University police officer believed the weapon to be a rifle "because of its sound," Gray said, and began looking for "potential sniper positions."

About 160 yards (150 meters) away, the officer spotted a roof area "as a potential shooting position."

There, he found "impressions in the gravel" consistent with the body of a "person in a prone shooting position."

Security surveillance footage confirmed that an individual dressed in dark clothing was on the roof at approximately 12:15 pm local time, Gray said.

That revelation marked the start of a 33-hour manhunt.

The apparent suspect entered campus at 11:51 am local time, wearing a black shirt with an American flag in the center, a dark baseball cap and large........

© International Business Times