Crime & Courts

Trial underway for Marengo man accused of sexually assaulting sleeping woman

Fredrick W. Ahlmann II, 44, of Marengo
Fredrick W. Ahlmann II, 44, of Marengo

Testimony began Wednesday in the trial of a Marengo man charged with a criminal sexual assault after police said he sexually assaulted a woman while she was asleep.

Fredrick W. Ahlmann II wore an orange jumpsuit and sat beside his public defenders Wednesday as witnesses recounted a February 2018 birthday party. It was there, police said, that Ahlmann sexually assaulted a woman who, earlier in the night, was photographed seemingly asleep on an ice hockey table.

Ahlmann, of the 300 block of Tioga Trail, has remained at the McHenry County Jail since police arrested him on Feb. 8, 2019, records show. His bond is set at $50,000.

If convicted of criminal sexual assault, Ahlmann could be sentenced to between four and 15 years in prison. Since the case is before a judge rather than a jury, McHenry County Judge Robert Wilbrandt will determine the final verdict.

The alleged assault happened Feb. 5, 2018, at a Marengo home where the woman lived with her mom and brother, prosecutors said. Ahlmann, 46, had been drinking at the same bar where the alleged victim’s mother was celebrating her birthday, multiple witnesses testified.

As the party died down about 2 a.m., several people from the bar returned to the woman’s house, for a final round of drinks and went to bed, the alleged victim’s brother said in court Wednesday.

In a petition seeking a civil no-contact order against Ahlmann, the woman said she became “hazy” sometime after 3 a.m. and didn’t remember how she got to her room. At one point, she awoke in the “pitch black” to an unknown person, later identified as Ahlmann, sexually assaulting her, court records show.

Ahlmann would go on to tell police that he helped the woman off of an ice hockey table, where she was lying on her back, and into her room, Marengo Police Detective Andrew Taylor said.

During subsequent police interviews, Ahlmann told investigators the woman was “sober enough to consent.” Ahlmann also acknowledged hearing the woman ask at lease three times who was in the room with her, including once during the alleged assault, Taylor said.

“His story changed several times that night,” Taylor said.

Other witnesses’ recollection of details surrounding the party also varied slightly Wednesday, with many saying it was hard to remember specific conversations or times nearly 1½years later.

Prosecutors are expected to play Ahlmann’s partially recorded police interview in court Thursday. The trial could last through Friday afternoon.

Loading more

Digital Access

Digital Access
Access nwherald.com and all Shaw Local content from all your digital devices and receive breaking news and updates from around the area.

Home Delivery

Home Delivery
Local news, prep sports, Chicago sports, local and regional entertainment, business, home and lifestyle, food, classified and more! News you use every day! Daily, weekend and Sunday packages.

Text Alerts

Text Alerts
Stay connected to us wherever you are! Get breaking news updates along with other area information sent to you as a text message to your wireless device.

Email Newsletters

Email Newsletters
We'll deliver news & updates to your inbox. Plan your weekend and catch up on the news with our newsletters.