The US State Department says Kotey "likely engaged in the group's executions and exceptionally cruel torture methods".
It is the latest of the terrorist group's gruesome execution tactics - which, in the past, have included pushing victims off buildings, crucifixion, and beheading.
The group's reporting on executions by stoning in 2002 on its Web site, www.meydaan.net — including a video of the execution of a prostitute — embarrassed the government and led the head of the judiciary to issue a motion urging judges to refrain from ordering stonings.
Alison Meuse, NPR's Middle East correspondent reported on Saturday that the Shiite Islamist militant group Hezbollah condemned Nimr's execution.
That's the group whose big concern before Timothy J. McVeigh's execution was that his last meal be meatless.
The latest transaction "represents further progress in the execution of the group's strategy," Stuart T. Gulliver, the chief executive, said in a statement.
Edward II's close relationship to Gaveston had been a source of conflict at court, and Gaveston's execution by a group of rebellious barons in 1312 had brought the country to the brink of civil war.
Several antigovernment extremist groups carried accounts of Mr. McVeigh's execution on their Web sites, though with little characterization of the man; one, posted by Posse Comitatus, a paramilitary group, issued a call for Monday to be commemorated as Timothy James McVeigh Day.
A few weeks after Agweng's execution, a dozen fighters from Kony's group, including Walter, escaped.
"This transaction represents further progress in the execution of the group's strategy," Mr. Gulliver said in a statement announcing the sale.
