Suspect in Blue Mounds killing not competent, ordered for treatment

Riley Berg's initial court appearance
Berg in court on Feb. 17

MADISON, Wis. — The Mount Horeb man accused of brutally killing a man on the side of a Dane County road was found not fit for trial Tuesday and will undergo treatment, according to court records.

Riley  L. Berg, 21, was in court for a competency hearing Tuesday on a first-degree homicide charge in the death of 26-year-old Nicholas Day.

Picture of Nicholas Day


According to court records, Berg was found “not competent but likely to be restored,” and the court ordered Berg be treated to  possibly regain competency.

Berg is facing a felony charge of first-degree intentional homicide with use of a dangerous weapon and is facing life in prison plus up to five years if convicted. However, the case is suspended as of Tuesday’s incompetency finding.

Riley was being held at the Dane County Jail, but he was moved to the Mendota Mental Health facility, also in Madison, effective Tuesday, court records show.

Day was killed on County Road JG in the town of Blue Mounds on Jan. 15. Sheriff Dave Mahoney called the killing an “extremely brutal homicide and very calculated.” Day was shot and  had 11 stab wounds, a medical examiner said.

A criminal complaint placed Berg’s car in surveillance video several times in the area around the time that Day was killed. Court records suggest Berg’s father told investigators his son was being treated for schizophrenia.