A former Baptist missionary convicted of shooting his wife to death on Valentine's Day last year has been sentenced to 80 years in prison.

According to reports, Peoria County Circuit Judge Kevin Lyons sentenced Nathan Leuthold, 39, on Wednesday in the execution-style murder of Denise Leuthold, 39. Lyons spoke to Leuthold and the crowded courtroom for 26 minutes, saying Leuthold "poisoned" his otherwise good, law-abiding life.

Leuthold was accused of shooting his wife in her parents' Peoria home so he could pursue an affair with a 21-year-old Lithuanian woman. He and his wife sponsored her to study in the U.S.

Leuthold has denied he shot his wife. His attorney argued that someone broke into the house. He said prosecutors didn't prove their case against his client and there was no proof Leuthold and the Lithuanian woman were having an affair.