A Missouri death row inmate was executed Tuesday night following denials of two appeals by the U.S. Supreme Court for a pair of 2006 slayings.

Brian Dorsey, 52, was pronounced dead at 6:11 p.m. after a single-dose injection of the sedative pentobarbital at the state prison in Bonne Terre, Karen Pojmann, communications director for the Missouri Department of Corrections told Fox News Digital in an email.

He took a few deep breaths as the drug was injected, then several shallow, quick breaths. At one point, he raised his head from the pillow and blinked hard. After several seconds, all movement stopped. A spiritual adviser seated next to the gurney continued to speak. It was unclear what he was saying — the room is soundproof.

Dorsey was served his customary last meal at 11 a.m. The meal consisted of two cheeseburgers, two orders of chicken strips, two large orders of French fries and a pizza with sausage, pepperoni, onion, mushrooms and extra cheese, the Missouri Department of Corrections told Fox News Digital. 

Dorsey received the death penalty for the 2006 killings of his cousin and her husband. The execution was carried out following denials by the U.S. Supreme Court of two appeals on Dorsey’s behalf. 

This photo shows a gurney used in giving lethal injections to convicted death row inmates. (AP Photo; Sue Ogrocki)

A day after the killings, Sarah Bonnie’s parents went to check on the Bonnies after they failed to show up for a family gathering. They found the couple’s 4-year-old daughter on the couch watching TV. She told her grandparents that her mother “won’t wake up.”

Dorsey surrendered to police three days after the killings.

He “has spent every day of the past 18 years trying to make up for the single act of violence” he committed in 2006, one of his lawyers said. 

“Executing Brian Dorsey is a pointless cruelty, an exercise of the State’s power that serves no legitimate penological purpose,” Kirk Henderson said in a statement.

In a final statement handed out prior to the execution, Dorsey expressed deep sorrow for the killings.

“Words cannot hold the just weight of my guilt and shame,” the written statement said, in part.

A clemency request to Missouri Gov. Mike Parson was denied. 

The Associated Press contributed to this report.