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Mark Hoeltzel

Doctor's stethoscope
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A former University of Michigan pediatric rheumatologist has been arrested and is in federal custody on child pornography charges.

Dr. Mark Hoeltzel was arrested as part of a larger investigation into a sexual relationship with a female patient that started when she was 18.

Police in Ann Arbor began looking at Hoeltzel in December, when the Michigan office of Licensing and Regulatory Affairs (LARA) was investigating that alleged relationship.