A Michigan man accused of molesting his adoptive grandson was convicted Thursday on four counts of first-degree sexual assault charges, MLive reported.

>> Read more trending news

A Jackson County District Court jury found Leonard Michael Ketchens, 72, guilty of molesting the boy starting in 1999 at his Jackson home, the website reported.

Ketchens' sentencing is scheduled for June 12, and he could face up to life in prison, MLive reported.

According to the Jackson County Prosecutor's Office, the victim said the assaults began when he was 13 and ended four years later, MLive reported.

Ketchens will remain in the Jackson County Jail until sentencing.