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On-duty trooper killed in rollover on I-90 identified

Governor says trooper was 'outstanding'

LAKE DELTON, Wis. - A Wisconsin State Patrol trooper was killed in a rollover wreck on Interstate 90 Tuesday morning, officials said. 

Gov. Scott Walker said in a news release that Anthony J. Borostowki, of Tomah, died in the line of duty after his patrol car struck a tree on Interstate 90-94 Tuesday. 

The Sauk County Sheriff's Office said first responders were sent to the crash on east I-90 at about 4:30 a.m. near mile marker 89. 

Borostowski was headed east on I-90-94 when he lost control of his patrol car, according to the report. The car entered the south ditch and struck a tree. 

The Sauk County coroner pronounced Borostowki dead at the scene. 

In a statement, Walker said Borostoski was "an outstanding trooper" and he was a staff sergeant in the Wisconsin National Guard. 

"Tonette and I send our prayers to Anthony’s family as they grieve the loss of their loved one. Anthony will never be forgotten,” Walker said in the statement. 


Walker said he met Borostoski in 2015 when the trooper received state patrol's lifesaving award for saving a man's life by performing CPR. 

All lanes for a 5-mile stretch of the eastbound interstate were closed for more than four hours Tuesday morning. The road was reopen shortly before 9 a.m.

The crash is under investigation by the Sauk County Sheriff’s Office.

Walker said he'll write an executive order lowering the U.S. and Wisconsin flags in honor of Borostowski.



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