The San Antonio Express-News reports Michael Yuchnitz was found dead this past weekend in a hotel parking lot after having collapsed.
The 60-year-old's official cause of death was cardiomyopathy, with lung cancer listed as a contributing factor.
Yuchnitz, known for sporting colorful outfits in television commercials for his optical and tattoo shops, had been set to go on trial in March. He had been free on bond.
His wife, Tina Yuchnitz, filed for divorce after learning of the alleged plot against her. A jury in 2012 recommended the couple split their assets 50-50.
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