The silence from Dubuque County Attorney Ralph Potter’s office after the shooting death of a Dyersville, Iowa, man on Nov. 29 might have some justification, according to one university law professor.

But as the county attorney’s office sorts through a controversial death investigation to determine whether force was justified, a recent analysis shows self-defense laws present problems for prosecutors in many parts of the country.

David Herman, 24, was killed after an altercation with 48-year-old Christopher S. Leppert, a locksmith from Dubuque.

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