Published: Apr 10, 2014 2:47 PM EDT

TALLAHASSEE, Fla. (AP) - The Supreme Court denied an appeal for a man scheduled to be executed April 23 for killing his cousin and his cousin's wife to prevent him from testifying in a burglary case.
    
Lawyers for Robert Eugene Hendrix argued that the judge at his murder trial was biased and he had an ineffective lawyer. The court rejected those arguments Thursday.
    
Hendrix, and his cousin, Elmer Scott, were arrested for breaking into a house in 1990. Scott accepted a plea deal that would keep him out of prison if he testified against Hendrix, who was facing at least four years in prison.
    
Before the case went to court, Hendrix went to Scott's Lake County home. Prosecutors say he shot Scott in the head and slashed the throat of his wife, Michelle.

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