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A palm print. A shoe im­pres­sion. And a high-pow­ered ri­fle found in a wood­ed area. Those are among the clues au­thor­i­ties laid out as they plead­ed for the pub­lic’s help to find the per­son who as­sas­si­nat­ed con­ser­v­a­tive ac­tivist Char­lie Kirk be­fore drop­ping from a Utah uni­ver­si­ty cam­pus roof and van­ish­ing.

The search con­tin­ued ear­ly Fri­day, near­ly two days lat­er.

Fed­er­al in­ves­ti­ga­tors and state of­fi­cials on Thurs­day re­leased a se­ries of pho­tos and a video of the per­son they be­lieve is re­spon­si­ble. Kirk was hit as he spoke to a crowd gath­ered in a court­yard at Utah Val­ley Uni­ver­si­ty in Orem.