BONNE TERRE, Mo. - The Latest on the Missouri execution of a man convicted of killing a sheriff's deputy and two other people in 2002 (all times local):

7:25 p.m.

A man who killed two people in a drug dispute and a sheriff's deputy in a subsequent shootout has been put to death in what could be Missouri's last execution for some time.

Earl Forrest was executed Wednesday.

Forrest went to the home of Harriett Smith in 2002 and demanded that she fulfil her promise to buy a lawn mower and mobile home for him in exchange for introducing her to a source for methamphetamine. During an argument, Forrest shot Smith and a visitor to her home, Michael Wells.

Forrest fatally shot Dent County Sheriff's Deputy JoAnn Barnes after she arrived at Forrest's home.

Missouri has executed 19 men since November 2013. But the remaining 25 death row inmates either have appeals still pending or other reasons they will not face imminent execution.

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3:50 p.m.

An activist who opposes the death penalty has been temporarily detained at the Missouri Capitol after attempting to enter the governor's office.

Jeff Stack was handcuffed and detained for trespassing Wednesday when he tried to open a door leading from the public waiting area to the inner office of Gov. Jay Nixon.

Stack said he wanted to talk to Nixon about stopping Wednesday's scheduled execution of Earl Forrest. He said death penalty opponents have "been polite for decades" but that "the governor hasn't really listened."

Capitol police later removed the handcuffs, saying no charges were being pressed.

Stack is a registered lobbyist for Missourians for Alternatives to the Death Penalty.

Forrest is scheduled to die Wednesday evening for the 2002 killings of Harriett Smith and Michael Wells and Dent County Sheriff's Deputy JoAnn Barnes.

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2:20 p.m.

The U.S. Supreme Court has refused to halt Earl Forrest's execution hours before the Missouri man is scheduled to die by injection.

The court issued its ruling without comment Wednesday. Forrest is scheduled to die Wednesday evening at the state prison in Bonne Terre for the 2002 killings of Harriett Smith and Michael Wells in a drug dispute and Dent County Sheriff's Deputy JoAnn Barnes in a subsequent shootout at Forrest's home.

Missouri Gov. Jay Nixon, a Democrat, denied a clemency request on Wednesday.

The state has executed 18 men since November 2013, including six last year. Forrest would be the first in 2016.

The pace of executions is expected to slow because most of the remaining death row inmates have pending appeals or have been declared unfit for execution.

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1:10 p.m.

Missouri Gov. Jay Nixon has denied clemency for condemned killer Earl Forrest, hours before Forrest's scheduled execution.

Forrest is scheduled to die by injection Wednesday at the state prison in Bonne Terre. He was convicted of the 2002 killings of Harriett Smith and Michael Wells in a drug dispute and Dent County Sheriff's Deputy JoAnn Barnes in a subsequent shootout at Forrest's home.

An appeal is still pending before the U.S. Supreme Court on the claim that the death penalty amounts to cruel and unusual punishment.

Missouri has executed 18 men since November 2013, including six last year. Forrest would be the first in 2016.

The pace of executions is expected to slow because most of the remaining death row inmates have pending appeals or have been declared unfit for execution.

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12:50 a.m.

A man convicted of killing a sheriff's deputy and two other people in 2002 is scheduled to be put to death in what could be Missouri's last execution for some time.

Earl Forrest was convicted of killing Harriett Smith and Michael Wells in a drug dispute and Dent County Sheriff's Deputy JoAnn Barnes in a subsequent shootout at Forrest's home. The 66-year-old is scheduled to be put to death Wednesday evening.

Missouri has executed 18 men since November 2013, including six last year. Forrest would be the first in 2016.

The pace of executions is expected to slow because most of the remaining death row inmates have pending appeals or have been declared unfit for execution. Missouri's death row population has been dwindling as juries sentence fewer people to death.

News from © The Associated Press, 2016