Prosecutors on Friday demanded life imprisonment for a former U.S. civilian base worker charged with raping and killing a 20-year-old woman in Okinawa in April last year.

Claiming Kenneth Franklin Shinzato, 33, committed "extremely heinous and selfish crimes," prosecutors sought a life term. Shinzato denied intent to murder the victim.

The Naha District Court will hand down its ruling on Dec. 1.