A federal judge on Monday sentenced former Westar Energy Inc. CEO David Wittig to 18 years in prison for looting millions from the Kansas utility.

U.S. District Judge Julie Robinson sentenced Wittig’s co-defendant, Douglas Lake, the former executive vice president of Westar, to 15 years in prison. Wittig and Lake also were ordered to pay fines of $5 million each, in addition to millions of dollars in restitution.