The Ohio Supreme Court today upheld the convictions and death sentence for a man who beat and stabbed his parents to death. Scott Mink pleaded guilty three years ago and asked the three-judge panel in Montgomery County to sentence him to execution. The justices ruled unanimously that the 40-year-old was competent when he rejected attorney help, entered his plea and declined to present any evidence to argue for a sentence of life in prison instead. The Supreme Court also independently reviewed Mink's background for evidence that would have supported a lighter sentence and found none. Mink admitted he killed 79-year-old William Mink and 72-year-old Sheila Mink as they slept in their apartment in Union in western Ohio. Evidence showed he later traded their car and television for crack cocaine.