Two men charged in Waukesha woman's overdose death

Berg, 21, and Hayes, 27, accused of providing heroin to woman

Oct. 9, 2013

Two men were accused on Tuesday of allegedly providing the heroin that caused the overdose death of a 21-year-old Waukesha woman.

Matthew C. Berg, 21, of Waukesha and Diono E. Hayes, 27, of Milwaukee were both charged on Oct. 8 in Waukesha County Circuit Court with first-degree reckless homicide.

According to the criminal complaint:

Alexandra “Alex” Stellhorn was found by her mother laying in the fetal position in her closet the morning of Aug. 23, dead from an apparent heroin overdose.

Waukesha City Police found under the woman’s bed two blue pills, later identified as alprazolam. According to, alprazolam is an anti-anxiety medication that works by slowing down the movement of chemicals in the brain.

A detective found a few days later a syringe, hidden inside a red plaid slipper in the closet where Alex’s body was discovered.

Alex’s mother Susan told police that her daughter had been struggling with heroin addiction. Alex had left the house at 6:30 p.m. the day before and went to a friend’s house in West Allis. She returned for a brief time at 8:45 p.m., but left again and did not return until 11:30 p.m.

Susan said that in the morning she was about to leave the house with her other daughter, but wanted to make sure Alex was awake. That is when she found the body.

Police were given permission to search Alex’s phone. They found a Facebook message sent by Berg at 6:30 p.m. on Aug. 22 that read: “Wanna get high as (expletive)?”

Berg told police in a statement that he was looking to sell a camera, but needed a ride from Alex. In exchange, Alex would get some of the heroin Berg bought with the camera money.

That plan fell through, Berg said, but Alex was able to get $40 from her house. Another man, who does not currently face charges related to the incident, had $20 and the three of them drove to Milwaukee to buy heroin.

Police allege in the complaint that Berg met with Hayes and purchased the heroin on behalf of the group. The group then returned to Waukesha and shot up in a parking lot, Berg said.

Berg and Hayes could each face up to 40 years in prison and $100,000 in fines if convicted. Berg is being held in Waukesha County Jail on a $25,000 cash bond. He is expected to appear again in court on Oct. 10.

An arrest warrant has been issued for Hayes, whose last known address was 1655 22nd St., Unit A, Milwaukee.

Alex Stellhorn was buried at Wisconsin Memorial Park on Tuesday, Aug. 27.

Haley Elizabeth Kozlowski wrote on the funeral home’s obituary webpage: “Alex was a wonderful young lady. She was outgoing and strong in spirit and was inspirational to be around. Alex was one of the most positive and enjoyable people I have met, who found happiness in the little things.”


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