Missouri man faces execution for raping, killing 15-year-old girl in 1989

The attorney for convicted killer Roderick Nunley is asking the U.S. Supreme Court to halt his client's execution because the death penalty amounts to cruel and unusual punishment. But a detective who helped break the case says Nunley should have been put to death long ago.

Nunley is scheduled to die at 6 p.m. Tuesday for raping and killing 15-year-old Ann Harrison in Kansas City in 1989.

In addition to the court appeal, Gov. Jay Nixon is reviewing a clemency request.

Nunley and Michael Taylor were both convicted of first-degree murder in a crime that shook the Kansas City area. Taylor was executed last year.

Retired Kansas City detective Pete Edlund called it "outrageous" that that the execution process has taken a quarter of a century.