The Girl Scouts from Chippewa Falls had adopted the hilly, rural stretch of County Road P in western Wisconsin, so with trash bags in hand, they dutifully picked up litter Saturday afternoon, tunics and sashes supplanted by lime-green safety vests.

Suddenly, a speeding Ford F-150 veered off the road into a ditch where three girls and an adult chaperone were performing community service. The two-ton pickup slammed into the Scouts, visiting tragedy on the town of 14,000 before speeding off.

Two girls and a chaperone were killed on the roadside, according to the Lake Hallie Police Department, which is investigating. One girl died later at a hospital. A surviving Scout was in critical condition. Authorities have not released the identities of the victims.

Colten Treu, 21, who is also from Chippewa Falls, later surrendered to police, authorities said. Investigators haven’t said what caused him to drive off the road. He was jailed Sunday and charged with four counts of homicide through the negligent use of a vehicle.

The rest of the community was left to come to grips with a sudden, almost unfathomable loss.

“Our hearts are broken for the girls and families of the Girl Scouts of the Northwestern Great Lakes,” Sylvia Acevedo, CEO of Girl Scouts of the USA, said in a statement Sunday.

It was the third tragedy in the greater community of Scouts in less than five months.

On Sept. 30, Boy Scouts on Long Island were headed to a hike when the group was slammed into by a suspected drunk driver, according to New York ABC affiliate WABC. Killed in the crash was Andrew McMorris, 12, a seventh-grader who had just started taking flying lessons and hoped to one day earn his Eagle Scout badge.

And in June, a 14-year-old Boy Scout taking shelter from 50 mph winds at a jamboree in northern Georgia was crushed in his tent.

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