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Kay Marie Sisto Peterson

Case from Duluth, MN dated May 27, 2010

Victim Details

Kay Marie Sisto Peterson

Female

White / Caucasian

Duluth

MN

2010-05-27

50

Kay

Marie Sisto Peterson

06/20/2026

Case Description

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In the spring of 2010, the life of 50-year-old Kay Marie Sisto Peterson, a Caucasian female from Duluth, Minnesota, came to a tragic and violent end. On May 27, she was shot multiple times in the head by her husband, Michael William Peterson, in their family home. The incident was the culmination of what her son would later describe as a controlling and possessive relationship that had soured after three decades of marriage. In the period leading up to the fatal shooting, Kay had expressed her u ...
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Links to Additional Sources (4)

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  • Kay Marie Peterson MN 05-27-2010
  • Kay Marie Sisto Peterson (1960-2010) - Memorials - Find a Grave
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    Forum Posts (1)

    I've been thinking a lot about how this must have impacted Kay's co-workers at the VA Clinic. Losing... ...Read More
    11/08/2023
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