Minnesota Public Radio slideshow:
Critics charge sex offender screening tool doesn't work
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Iowa State University professor Doug Epperson was lead researcher on the project to develop the Minnesota Sex Offender Screening Tool in the early 1990s. (Photo courtesy of Iowa State University)

Iowa State University professor Doug Epperson was lead researcher on the project to develop the Minnesota Sex Offender Screening Tool in the early 1990s.

(Photo courtesy of Iowa State University)
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