An Ohio jury has found former NFL linebacker Nate Webster guilty of four counts of unlawful sexual conduct with a minor, a conviction that could result in Webster being sentenced to up to 20 years in prison.

Webster was also charged with gross sexual imposition and sexual battery, but was acquitted on those charges. He was also acquitted on a fifth count of unlawful sexual conduct with a minor.

Prosecutors accused Webster of having a sexual relationship with a girl when she was 15 and he was in his 30s, and of threatening to kill her and her family if she told anyone. Webster admitted he had sex with the girl, but claimed it was consensual and that the sexual relationship began after she turned 16, which is the age of consent in Ohio.