Milwaukee doctor inseminated patients with own sperm, law firm says

Published June 9, 2026 4:15 PM CDT

A former Milwaukee OB-GYN is accused of using his own sperm to secretly inseminate patients. Now, a law firm is looking for additional victims after multiple half-siblings showed up on a DNA test with the same biological father.

FOX6 News is not naming the OB-GYN because he has not been charged, and there is not a civil lawsuit filed yet. That's because the law firm, Cannon & Dunphy, is still looking for additional victims to be added to a civil lawsuit.

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Law firm's claim

What they're saying:

Attorney Al Foeckler said the OB-GYN allegedly inseminated patients with his own sperm without their knowledge or consent. The attorney said the doctor practiced at a Milwaukee office for decades.

Cannon & Dunphy 

Foeckler's client said, in 1982, she consented to artificial insemination using sperm from an anonymous donor represented to be a medical student. Instead, the law firm claims the doctor used his own sperm.

In 2024, that patient's son, Joseph Laedtke, did a DNA test through Ancestry.com. The results revealed biological connections to multiple half-siblings with a common biological father, traced back to the OB-GYN in question.

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The law firm said they believe there are at least nine other victims.

"Tragically, we know my clients are not alone. Because the DNA tells us my clients are not alone. There are other half-siblings out there. There are other mothers who were victimized," said Foeckler.

What's next:

FOX6 News asked the Whitefish Bay Police Department if it is investigating the matter. The chief said there are no open investigations.

Attorneys said they plan to file a civil lawsuit within 30 days.

The Source: FOX6 News heard from Canon & Dunphy about the law firm's intent to file a civil lawsuit and reached out to the Whitefish Bay Police Department.

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