MONROE COUNTY, Michigan — A Michigan family doctor was arrested after soliciting a mom to have a sexual relationship with her 5-year-old daughter, Florida police say.

An investigation began into William Murdoch in June 2025 when he began chatting with a "mom" online, who was actually an undercover detective from Florida.

Police say Murdoch was pursuing a platonic relationship with the woman to see if she would allow her daughter, 5, to be courted by and have a sexual relationship with him.

Murdoch sent "stomach-churning" messages about his plans to groom the child and turn the situation sexual, investigators say. They say Murdoch went into detail about his "demented behavior" that they say is "too explicit to share in its entirety."

Detectives say a digital forensic exam into Murdoch's

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