Serial Killer Appealing Death Sentence - NBC Right Now/KNDO/KNDU Tri-Cities, Yakima, WA |

Serial Killer Appealing Death Sentence

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SEATTLE, Wash., - Serial killer Robert Yates is seeking an appeal on his death sentence with an appeal through the federal court system.

He filed a petition Wednesday in Seattle that says his lawyers failed to present evidence of mental illness during his 2002 trial in Pierce County.  He was convicted of killing two women in 1997 and 1998 and got the death penalty.  The sentence has been upheld by the Supreme Court as well.

The 60-year-old former Air National Guard pilot from Spokane pleaded guilty in 2000 to 13 other murders in Spokane, Skagit and Walla Walla counties.

He was given a sentence of more than 400 years in prison in a plea deal.