The girls were in the fourth grade at Halmstad Elementary School in Chippewa Falls, Wisconsin, the Minneapolis Star-Tribune quoted a relative of a girl in the troop who was not injured as saying.
"Our hearts are broken for the girls and families of the Girl Scouts of the Northwestern Great Lakes", CEO Sylvia Acevedo of Girl Scouts of the U.S. said in a statement on Sunday, as vigils were held in the girls' community.
"Our hearts are with our Girl Scout sisters in Chippewa Falls, Wisconsin", the Girl Scouts of the US and its CEO, Sylvia Acevedo, posted on Twitter and Facebook.
The girls were members of Troop 3055 in nearby Chippewa Falls. A makeshift memorial of teddy bears, balloons and candles was set up on two wooden benches.
Residents and local business owners near the site of the crash told the Star Tribune that the site is notoriously unsafe.
"It's been very nice".
"Our thoughts and prayers go out to the families, friends, fellow students, fellow scouts and everyone else impacted by this", the Chippewa Falls Police Department said.
Golden added the district and school crisis teams assembled support networks for students, staff and families.
Police and witnesses said Treu was speeding on a highway when it veered into a shallow ditch where the girls and Schneider were picking up trash as part of an "Adopt-A-Highway" group. The Chippewa County Sheriff's Office said that authorities are pursuing charges that would include four counts of homicide by negligent operation of a vehicle, four counts homicide by intoxicated use of a vehicle, four counts of hit-and-run involving death, and one count of hit-and-run involving great bodily harm. It was unclear on November 4 if Treu had an attorney who could speak for him.
Police say the 21-year-old driver accused of striking and killing three Girl Scouts and a mother and injuring a fourth girl had been inhaling chemical vapors before the crash in northwestern Wisconsin. They said that drivers tend to speed down that stretch of road, going much faster than the limit, which is 35MPH.
After turning himself in to police, Treu admitted to police that he and the passenger in his vehicle had intentionally inhaled chemicals, which is commonly referred to as "huffing", just prior to the incident.
Sherri Jasper, a Girl Scout board member and counselor at Halmstad Elementary School, leads the program for a candlelight vigil at the school in Chippewa Falls, Wis., on Sunday evening.