<p>WASHINGTON -- A Texas appeals court refused to review the case of condemned Mexican citizen Javier Suarez Medina on Monday, even as Mexican officials promised to appeal his execution to the U.S. Supreme Court.</p>
<p>Also Monday, Mexico President Vicente Fox released a letter sent to Texas Gov. Rick Perry asking him to halt Suarez Medina's scheduled execution and calling the punishment "illegal."</p>
<p>Suarez Medina, 33, is to die by lethal injection Wednesday in Texas. He was convicted in 1989 of killing a Dallas police narcotics officer.</p>