The latest on the scheduled execution of Missouri inmate Roderick Nunley, who was convicted of kidnapping, raping and killing a 15-year-old girl in Kansas City in 1989 (all times local):

1 a.m.

Missouri prison officials are preparing to execute a man convicted of killing a 15-year-old girl more than two decades ago in Kansas City.

Fifty-year-old Roderick Nunley is scheduled to be executed at 6 p.m. Tuesday for the kidnapping, rape and stabbing death of Ann Harrison. Investigators say the girl was randomly targeted while waiting in her driveway for the school bus on the morning of March 22, 1989.

Nunley's co-defendant, Michael Taylor, also was convicted of first-degree murder. He was executed last year.

Nunley's attorney has three appeals pending before the U.S. Supreme Court. One questions the constitutionality of the death penalty, while another argues that Nunley should've been sentence by a jury, not a judge. An appeal filed Monday takes issues with Missouri's process of secretly acquiring its execution drug.

Gov. Jay Nixon is also weighing a clemency petition.

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