Updated

The U.S. Supreme Court is weighing whether to intervene in the scheduled Missouri execution of an Illinois man condemned to death in the 1995 killing of a suburban St. Louis college student.

If carried out as scheduled at 12:01 a.m. Wednesday, 43-year-old Michael Worthington's execution will be the first in the nation since a lethal injection went awry last month in Arizona.

Worthington was sentenced to death in 1998, after he pleaded guilty to raping and strangling Melinda "Mindy" Griffin.

Worthington, from Peoria, Illinois, confessed that he broke into Griffin's St. Charles County apartment. He said he choked her into unconsciousness and raped her. When she regained consciousness, he strangled her.

Worthington's appeals question the secrecy involving the execution drugs, as well as flawed executions recently in three other states.