LINCOLN COUNTY(WAOW) -- Chase Boruch is now held at the Lincoln County jail for first degree homicide of his mother, Sally Pergolski, of Wausau. The Lincoln County sheriff, Jeff Jaeger, reports that Boruch was arrested Monday evening at his apartment in Madison.
According to the criminal complaint, Boruch says he and his mother were heading out to a fishing trip when they lost control of their car and landed in Moraine lake in the Town of Harrison.
Jaeger says a deputy arrived at the scene and thought the circumstances were questionable.
The complaint says he found Pergolski on the shore with her face in the ground.
The EMT's could not resuscitate her.
"Based upon a review of evidence, Lincoln County coroner Paul Crew found the cause of the death to be homicide," says Jaeger.
Jaeger says a forensic pathologist determined Pergolski experienced head trauma two hours before the crash was reported.
Investigators say they've been gathering evidence since June.
Authorities say weeks prior to the accident Boruch assisted his mother taking out several life insurance policies in which he was a beneficiary.
Neighbors in Pergolski's Wausau neighborhood were shocked with the news. Pergolski had lived in the area for over 20 years. They say the environment wasn't always peaceful, but they never thought it would lead to a murder.
"Like any teenager, there were arguments when he was a teenager, but as I know in recent years they had gotten along well," says neighbor Carolyn Smith.
Smith says she knew Pergolski well. Pergolski worked for Smith's cleaning business.
She says the news that Pergolski's son is charged with murder is disturbing.
"It's like you can't believe he would have done something like that. But yeah, you know it's possible."
Boruch attended the University of Wisconsin-Madison.
The date of his initial court appearance is still to be determined.