Dateline NBC

Secrets in Pleasant Prairie

Nov 29, 2023
An investigation into the poisoning death of a Wisconsin mother reveals a surprising twist when a letter points to a possible suspect. Detectives uncover disturbing incidents and harassment in her life, leading them to suspect foul play. New evidence and suspicious circumstances surround Julie Jensen's death, including conflicting theories and potential suspects. Mark, the husband, is interrogated but released due to lack of evidence. A shocking revelation is revealed by a surprise witness. Ed Klug testifies that Mark expressed hatred towards his wife and discussed ways to kill her.
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ANECDOTE

Julie Jensen's Death

  • In Pleasant Prairie, Wisconsin, during the Christmas season of 1998, 40-year-old Julie Jensen was found dead in her bed.
  • Her husband, Mark, claimed to have discovered her unresponsive after picking up their children from school.
ANECDOTE

Previous Harassment Reports

  • Local police were familiar with Julie due to numerous harassment reports she had filed over the years.
  • These included hang-up calls, pornographic pictures at Mark's office and their home, and rearranged outdoor furniture.
ANECDOTE

A Secret and a Letter

  • A secret was revealed: Julie had admitted to having an affair.
  • An explosive piece of evidence surfaced: a letter Julie left for the police.
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