A former Baptist missionary accused of shooting his wife to death on Valentine's Day of last year was found guilty of first-degree murder.

According to reports, the jury deliberated for about 90 minutes Monday before finding Nathan Leuthold guilty in the death of 39-year-old Denise Leuthold.

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

Leuthold's attorney argued that someone broke into the house, that prosecutors didn't prove their case against his client, and that there was no proof Leuthold and the Lithuanian were having an affair.

Leuthold faces between 45 years and life in prison when he is sentenced Sept. 10.