Minnesota man on probation for one child beating now charged with murder in new case

Blake Holmquist suffered severe brain injuries on May 11 and died last week.

June 8, 2017 at 3:05AM
Sixteen-month-old Blake Holmquist suffered severe brain injuries on May 11 and died last week.
Sixteen-month-old Blake Holmquist suffered severe brain injuries on May 11 and died last week. (Colleen Kelly/The Minnesota Star Tribune)

A man serving probation in Wisconsin for inflicting severe brain damage on a toddler is now charged with murder in Washington County in connection with the beating of a 16-month-old boy this spring.

Jonathon D. Wierstad, 28, of Willernie, had a charge of first-degree assault upgraded Monday to second-degree murder following the death Saturday of Blake Holmquist, his fiancée's child, stemming from injuries inflicted May 11 at the defendant's home.

Wierstad remains jailed in lieu of $2 million bail and is due back in court on June 22. His attorney declined Tuesday to speak about the allegations.

After a similarly violent incident, Wierstad and prosecutors in neighboring St. Croix County, Wis., agreed five months ago to allow him to plead no contest to causing permanent brain damage to the 3-year-old son of Stacie Nanoff, a Hudson-area woman who was his girlfriend at the time of the 2014 incident.

He spent six days in jail in January 2017 for the injuries he inflicted upon Cedarius Nanoff and was put on probation for one year.

St. Croix County District Attorney Michael Nieskes told the Star Tribune on Tuesday that his office agreed to the plea deal because "the facts in the case gave us some proof issues, and we made the decision that we thought was in the best interests of the community and in accordance with the wishes of the victim's mother."

Nieskes added that several other factors weighed into Judge Eric Lundell's approval of the plea that kept Wierstad out of prison, among them that Wierstad had no criminal history up to that point and that he caused no problems while out on bond for the 2¾ years from the time of the 3-year-old's injuries until sentencing.

The prosecutor in the Washington County case, Kevin Mueller, said Tuesday that the manner in which the injuries were inflicted on both children "seems to be very similar. That is very concerning."

On May 11, police and paramedics arrived at Wierstad's home, where they found the boy unresponsive, according the criminal complaint. An ambulance took Blake to a hospital, where he underwent emergency surgery for extreme swelling and bleeding on his brain.

Wierstad told police that his fiancée, Alycia Holmquist, went to pick up her 7-year-old son from school, leaving him to look after her 3- and 5-year-old children and the 16-month-old.

He said the 16-month-old fell down the stairs.

The surgeon contradicted Wierstad's contention and said the boy's injuries were "more akin to the type of head injury a child would suffer in a high-velocity car accident ... or severe shaking."

Paul Walsh • 612-673-4482

Jonathon D. Wierstad
Jonathon D. Wierstad (The Minnesota Star Tribune)
Blake Holmquist
Blake Holmquist had severe brain injuries. (The Minnesota Star Tribune)
about the writer

about the writer

Paul Walsh

Reporter

Paul Walsh is a general assignment reporter at the Star Tribune. He wants your news tips, especially in and near Minnesota.

See More