Updated

A man who went on a 1992 Christmas holiday killing spree that left six people dead, including an 18-year-old mother gunned down at a pay phone, was executed Tuesday, the state's second lethal injection in two weeks and the 1,000th execution in the U.S. since the death penalty was reinstated in 1976.

Marvallous Keene, 36, who was convicted in five of the murders, chose not to file a late appeal over his death sentence.

He died by lethal injection at the Southern Ohio Correctional Facility in Lucasville — seven days after Ohio's last execution. It was the fastest turnaround since the state executed two inmates in six days in 2004.

The Ohio Supreme Court, in denying a request last month to delay Keene's execution, said it would schedule future executions at last three weeks apart so that public defenders will have more time to prepare clemency cases for inmates who wish to pursue it.

Ohio has one execution scheduled per month through February 2010.

Keene and three accomplices went on a three-day murder and robbery rampage in Dayton that began on Christmas Eve 1992.

Victims included Sarah Abraham, 38, a convenience store clerk shot in the head after handing over $30 from a cash register, and Marvin Washington and Wendy Cottrill, two teenage acquaintances who Keene feared. Gov. Ted Strickland last week denied clemency for Keene, who didn't request it.

Defense attorneys have said Keene, who was 19 at the time of the slayings, was despondent over the death of his brother, who was shot and killed a year earlier. At his trial, Keene also told a three-judge panel that a falling out with his father contributed to his troubled emotional state.

Prosecutors described Keene as the ringleader of a group that called itself the Downtown Posse. The killings began with 34-year-old Joseph Wilkerson.

Keene and his accomplices arrived at Wilkerson's home under the pretext of wanting to participate in an orgy, prosecutors said. They tied Wilkerson to his bed and ransacked the house, and when Keene found a .32-caliber handgun in the garage, he returned to the bedroom and shot Wilkerson twice.

Later Christmas Eve, Keene and accomplice DeMarcus Smith approached 18-year-old Danita Gullette at a pay phone, took her jacket and shoes and fatally shot the woman, prosecutors said. Gullette was the mother of a 2-year-old girl.

Washington, 18, and Cottrill, 16, were acquaintances who sometimes stayed at Keene's apartment and observed Keene returning with stolen items, prosecutors said. They were shot and killed behind a gravel pit.

Keene's accomplices are serving life sentences.

Ohio has put 31 men to death since it reinstated the death penalty in 1999. John Fautenberry, 45, a former Oregon truck driver who went on a multistate killing spree in the early 1990s, was executed last week.