Shooting death of Trooper Casper: Fond du Lac Co. District Attorney to release results of investigation

FOND DU LAC— A Wisconsin prosecutor is expected to lay out the findings of an investigation into the death of a rookie state trooper last March.

Trevor Casper was on his first solo patrol when he died in a shootout with Steven Snyder in Fond du Lac. Authorities have said the 38-year-old Snyder was a serial bank robber who had just robbed a bank in Wausaukee and the 21-year-old Casper was confronting him.

They also said Snyder killed 59-year-old Thomas Christ earlier in the day not far from the site of the Wausaukee robbery.

Fond du Lac County District Attorney Eric Toney has a news conference scheduled for Thursday afternoon.

Authorities in Snyder's home state of Michigan said this week that Snyder was responsible for nine bank robberies in three states.