WATERLOO, Iowa (AP) — An Iowa woman has been acquitted of two counts of first-degree murder in the slayings of her husband and his girlfriend more than 30 years ago.

After nearly eight hours of deliberation, jurors found 54-year-old Theresa Supino not guilty in the 1983 killings of Steven Fisher and Melisa Gregory, whose bodies were found on the Copper Dollar Ranch northwest of Newton.

Jurors weighed witness testimony and crime scene evidence presented over nearly three-week trial in which prosecutors said Supino killed Fisher and Gregory out of anger over their relationship. The defense said the murders could have been related to the former ranch owner's drug trafficking.

It's unclear whether officials will continue to investigate the murders.

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