An Ohio man accused of being romantically involved with his foster daughter and conspiring with her to kill his wife has been convicted of sexual battery and conspiracy charges.

A jury in Lake County convicted 43-year-old Kevin Knoefel (keh-NAY'-fel) Wednesday on six counts of sexual battery, three counts of complicity to aggravated murder and two counts of conspiracy to commit aggravated murder.

He'll be sentenced later. His attorney says he could face 25 years to life in prison.

Defense attorney Michael Connick says they plan to appeal.

The defense says the now-19-year-old foster daughter is mentally ill and acted alone in the fatal stabbing of Knoefel's 41-year-old wife, Lisa.

The daughter testified that she was in love with Knoefel and they planned the slaying so they could be together.