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St. Louis County, MO (KSDK) - The Missouri Supreme Court has denied an appeal against a man convicted and sentenced to death for the murders of his girlfriend and her three children in November 2004.

In a 6-0 decision, the state's high court ruled Leonard Taylor failed to prove he was denied due process. The court determined the result of the original trial would not have been different "because overwhelming evidence was presented at trial of (Taylor's) guilt."

A jury convicted Leonard Taylor in February 2008 for the deaths of 28-year-old Angela Rowe, and her three kids, ages 5, 6 and 11. Taylor was dating Rowe at the time of the killings and lived in her home.