<p>SAN FRANCISCO - The state on Tuesday postponed indefinitely the execution of a condemned killer amid a court battle over the state's method of lethal injection and the role doctors may play in the death chamber.</p>
<p>State officials notified the federal courts they would be unable to comply with a judge's order to have a lethal dose of barbiturate administered to Michael Morales by a medical professional in the execution chamber, a spokeswoman for the federal courts told The Associated Press.</p>