Collin County Killer Executed

Kosoul Chanthakoummane

Texas executed Kosoul Chanthakoummane, 41, Wednesday evening after 6:00 for murdering Collin County Real Estate Agent Sarah Walker, age 40, in 2006. They found her stabbed more than 30 times in a McKinney model home. She had DNA evidence under her fingernails, condemning Chanthakoummane.