<strong>By MICHAEL BALSAMO Associated Press<\/strong>\nTERRE HAUTE, Ind. (AP) \u2014 The federal government on Tuesday carried out its first execution in almost two decades, killing by lethal injection a man convicted of murdering an Arkansas family in a 1990s plot to build a whites-only nation in the Pacific Northwest.\nThe execution of Daniel Lewis Lee came over the objection of the victims' relatives and following days of legal wrangling and delays.\nLee, 47, of Yukon, Oklahoma, professed his innocence just before he was executed at the federal prison in Terre Haute, Indiana.\n"I didn't do it," Lee said. "I've made a lot of mistakes in my life, but I'm not a murderer."\nHis final words were: "You're killing an innocent man."\nThe decision to move forward with the first execution by the Bureau of Prisons since 2003 -- and two others scheduled later in the week \u2014 drew scrutiny from civil rights groups and the relatives of Lee's victims, who had sued to try to halt it, citing concerns about the coronavirus pandemic. The pandemic has killed more than 135,000 people in the United States and is ravaging prisons nationwide.\nCritics argued that the government was creating an unnecessary and manufactured urgency for political gain.\nOne of Lee's lawyers, Ruth Friedman, said it was "shameful that the government saw fit to carry out this execution during a pandemic."\n"And it is beyond shameful that the government, in the end, carried out this execution in haste," Friedman said in a statement.\nThe developments are likely to add a new front to the national conversation about criminal justice reform in the lead-up to the 2020 elections.\nThe execution of Lee, who died at 8:07 a.m. EDT, went off after a series of legal volleys that ended when the Supreme Court stepped in early Tuesday in a 5-4 ruling and allowed it to move forward.\nAttorney General William Barr has said the Justice Department has a duty to carry out the sentences imposed by the courts, including the death penalty, and to bring a sense of closure to the victims and those in the communities where the killings happened.\nBut relatives of those killed by Lee in 1996 strongly opposed that idea and long argued that Lee deserved a sentence of life in prison. They wanted to be present to counter any contention that the execution was being done on their behalf.\n"For us it is a matter of being there and saying, 'This is not being done in our name; we do not want this,'" relative Monica Veillette said.\nThey noted that Lee's co-defendant and the reputed ringleader, Chevie Kehoe, received a life sentence.\nKehoe, of Colville, Washington, recruited Lee in 1995 to join his white supremacist orgaization, known as the Aryan Peoples' Republic. Two years later, they were arrested for the killings of gun dealer William Mueller, his wife, Nancy, and her 8-year-old daughter, Sarah Powell, in Tilly, Arkansas, about 75 miles (120 kilometers) northwest of Little Rock.\nAt their 1999 trial, prosecutors said Kehoe and Lee stole guns and $50,000 in cash from the Muellers as part of their plan to establish a whites-only nation.\nProsecutors said Lee and Kehoe incapacitated the Muellers and questioned Sarah about where they could find money and ammunition. Then, they used stun guns on the victims, sealed trash bags with duct tape on their heads to suffocate them, taped rocks to their bodies and dumped them in a nearby bayou.\nA U.S. District Court judge put a hold on Lee's execution on Monday, over concerns from death row inmates on how executions were to be carried out, and an appeals court upheld it, but the high court overturned it. That delay came after an appeals court on Sunday overturned a hold that had been put in place last week after the victims' relatives argued they would be put at high risk for the coronavirus if they had to travel to attend the execution.\nLee's execution was then set to happen at 4 a.m. EDT, but a last-minute legal question was raised by his lawyers. The Justice Department said it filed a request with the court to straighten it out but went through with the execution.\nA U.S. marshal lifted a black telephone inside the execution room -- a small square room inside the prison with green tiles and windows looking at the witness rooms -- and asked if there was anything to impede the execution. He said there was not and the execution could proceed.\nLee had a pulse oximeter on a finger of his left hand, to monitor his oxygen level, and his arms, which had tattoos, were in black restraints. The IV tubes were coming through a metal panel in the wall.\nHe breathed heavily before the drug was injected and moved his legs and feet. As the drug was being administered, he raised his head to look around. In a few moments, his chest was no longer moving.\nLee was in the execution chamber with two men who the Bureau of Prisons would only identify as "senior BOP officials," a U.S. marshal and his spiritual adviser, whom a Bureau of Prisons spokesperson described as an "Appalachian pagan minister." They did not wear masks, and Lee also was not wearing a mask.\nOne of the senior Prison officials in the room declared Lee's time of death at 8:07 a.m., and the curtain closed.\nTwo other federal executions are scheduled for later this week, though one remains on hold in a separate legal claim.\nThere have been two state executions in the U.S. since the pandemic forced shutdowns nationwide in mid-March \u2014 one in Texas and one in Missouri, according to the Death Penalty Information Center. Alabama carried out one in early March.\nExecutions on the federal level have been rare, and the government has put to death only three defendants since restoring the federal death penalty in 1988 \u2014 most recently in 2003, when Louis Jones was executed for the 1995 kidnapping, rape and murder of a young female soldier.\nThough there hadn't been a federal execution since 2003, the Justice Department has continued to approve death penalty prosecutions and federal courts have sentenced defendants to death.\nIn 2014, following a botched state execution in Oklahoma, President Barack Obama directed the Justice Department to conduct a broad review of capital punishment and issues surrounding lethal injection drugs.\nThe attorney general said last July that the Obama-era review had been completed, clearing the way for executions to resume. He approved a new procedure for lethal injections that replaces the three-drug combination previously used in federal executions with one drug, pentobarbital. This is similar to the procedure used in several states, including Georgia, Missouri and Texas, but not all.\nNumbers of state executions have fallen steadily since the last federal execution, according to data compiled by the Death Penalty Information Center. States put to death 59 people in 2004 and 22 in 2019, nine of which were in Texas.\n___\nAssociated Press writers Mark Sherman and Colleen Long in Washington and Michael Tarm in Chicago contributed to this report.