The Illinois Supreme Court on Tuesday denied a motion to block the execution of serial killer John Wayne Gacy, scheduled for next week.
Gacy, 52, has two other lawsuits pending that could delay or block the execution set for Tuesday for the sex killings of 33 young men and boys.
He originally was scheduled to die on June 2, 1980, but appeals have kept him alive on Death Row at Menard Correctional Center in Chester.
Gacy, a former building contractor who worked as a clown at children's parties, was convicted in 1980 of more murders than anyone else in U.S. history at that time.
Gacy was accused of luring his victims to his home for sex, then strangling them. Twenty-seven bodies were found in the crawl space under his house. Others were found under the concrete floor of his garage and in rivers nearby.
In Tuesday's ruling, the state Supreme Court issued a three-sentence order denying Gacy's motions to either postpone or overturn the execution order.