Willmar police arrest suspect in 1974 cold case murder


WILLMAR — The Willmar Police Department today has reportedly concluded a 46-year-old cold case investigation with the arrest of a suspect in Sioux Falls, South Dakota, for the 1974 murder of Mabel Agnes Herman in Willmar.

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Mark Wasson has been a public safety reporter with Post Bulletin since May 2022. Previously, he worked as a general assignment reporter in the southwest metro and as a public safety reporter in Willmar, Minn. Readers can reach Mark at
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