A court sentenced a former U.S. base worker to life in prison on Friday for the April 2016 rape and murder of a 20-year-old woman in Okinawa.

The Naha District Court handed down the sentence to Kenneth Franklin Shinzato, 33, in line with the prosecutors' demand.

"There is no space for extenuating circumstances for such a selfish motive and the criminal responsibility is grave," the court said.