Jensen, 63, first was convicted in 2008 in the slaying of Julie Jensen inside their Pleasant Prairie home.
Prosecutors alleged he began poisoning her with antifreeze in December 1998, drugged her with a sleeping medication and later suffocated her to death over a three-day period.
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A Wisconsin jury has found a man guilty of killing his wife in 1998. The man spent a period of three days poisoning his wife with antifreeze and then fatally suffocated her.
Jensen had maintained his innocence, with his attorneys arguing that Julie Jensen was depressed and killed herself after framing her husband.
He was sentenced then to life without parole, but a Kenosha County judge vacated Jensen's first conviction in April 2021 after the Wisconsin Supreme Court ruled he deserved a new trial. The court found that a letter his wife wrote incriminating him in the event something should happen to her could not be used by the prosecution.
Jensen is scheduled to be sentenced on April 14.