BAGHDAD—A politician widely accused of running death squads might not be expected to have an easy time running for public office.

But this is Iraq. In a nation sadly inured to years of sectarian bloodletting, Hakim al-Zamili not only has a place on a prominent Shiite election slate, but stands poised to win a place in the Parliament.

It is an astonishing turnabout that shows the limits of political reconciliation. While some Sunni candidates have been barred from running in the election for their alleged support of the Baath Party, al-Zamili's candidacy has provoked nary a protest from the nation's leading Shiite politicians. That runs the risk that Shiite leaders will be seen as taking steps against only those who persecuted Shiites, not Sunnis.

Al-Zamili's new political role has heightened concerns that for all the talk of cross-sectarian alliances among some Shiite and Sunni factions, Iraq may be unable to firmly break with its troubled past.

The embrace of his candidacy “;sends the worst possible message to loyal Iraqis,”; said one U.S. official who was involved in a fruitless effort to convict al-Zamili at a high-profile trial in 2008. He spoke on the condition that he not be identified because he was not authorized to comment on Iraqi political developments.

Sitting inside his ramshackle campaign headquarters in Sadr City, al-Zamili insisted that the charges against him were no more than politically motivated fabrications. But he was unapologetic about the attacks that Shiite militias like Muqtada al-Sadr's Mahdi Army carried out in past years against the Americans and Sunni insurgents.

“;Many people in politics understand that resistance was our right because we were occupied,”; he said. “;We had a duty to protect the people from the U.S. forces and the attacks of terrorists,”; he said.

Now that U.S. troops are withdrawing, al-Zamili, the dark circles under his eyes giving him a worn look even when he smiles, said it was time to abandon armed struggle. As candidate No.15 on the Iraqi National Alliance slate, he is part of a coalition that includes Ibrahim al-Jaafari, the former prime minister, and Ahmed Chalabi, the longtime political survivor who led the effort to disbar Sunni candidates and who draws support, American officials charge, from Iran.

“;They thought they would end the Sadrist movement, but we persevered,”; al-Zamili said. Several years ago al-Zamili was a protagonist in a very different drama. The Ministry of Health and the hospitals that it oversaw were some of the first institutions that al-Sadr's supporters controlled after the ouster of Saddam Hussein. Al-Zamili, U.S. officials say, was appointed to his ministry post with al-Sadr's backing.

According to the inquiry that led to al-Zamili's trial, the ministry's protection service was used as a private militia to kidnap and kill hundreds of Sunnis from 2005 to early 2007. A deputy health minister, Ammar al-Saffar, who was gathering data on abuses at the ministry, disappeared before he could turn over his findings to Prime Minister Nouri Kamal al-Maliki. He vanished after telling associates that al-Zamili had threatened him.

Al-Zamili was arrested in early 2007 after al-Maliki had a falling out with al-Sadr. U.S. officials worked closely with Iraqi officials to build a case that al-Zamili was involved in murder, kidnapping and corruption. His trial was to be the first of a high-ranking Shiite official for sectarian crimes—an event, one U.S. official asserted, that would be as important in establishing the rule of law in Iraq as the trial of Saddam Hussein.

After a two-day trial, marred by accusations of witness intimidation, the charges were dropped and al-Zamili was freed after spending more than a year in American custody.

Al-Zamili denied in the interview that he had ever orchestrated the kidnappings and killings. “;They accused me of fueling the violence,”; he said. “;Each and every person resisting and opposed to the occupation is a terrorist, a thief, a criminal,”; he said dismissively.

As it turns out, he said, his arrest actually was a political boon. He has trumpeted his position at the Health Ministry in his campaign. Quoting Gandhi, he has portrayed himself as a political martyr. “;It was a benefit to me because people related to me,”; he said. “;They saw me suffering. And suffering is good for the soul.”;

The families of those he stood accused of ordering murdered say they are aghast. Ali al-Saffar, al-Saffar's son, said in a telephone interview from London that al-Jaafari had been a family friend and that when he met with the former prime minister three years ago al-Jaafari acknowledged receiving information linking al-Zamili to his father's disappearance.

“;Despite their emphasis on personal morality, they have sadly shown they are willing to forfeit their ideals in the pursuit of power, including by welcoming into their ranks people like Hakim al-Zamili,”; al-Saffar said, referring to the Iraqi National Alliance slate.

Manal Finjan, a candidate in the election and a spokeswoman for al-Jaafari's list, said the courts had exonerated al-Zamili, and he should therefore be treated like any other candidate.

“;We actually deal with people on the basis of evidences and documents,”; she said. “;He was acquitted by the court, and anybody who has evidence against him could go to the proper authorities.”;

While al-Zamili is now a player in the political game, he did not rule out the possibility that the militias might be once again called on to defend the people. “;If there were a bad situation, an increase in attacks, the continuation of unjust arrests, they will force us to defend ourselves and our leaders,”; he said.

This may be a bit of bravado. Support for the Sadrists drained as Iraqis tired of violence and sectarian killings. But judging by the mood of the dozens of young men in the muddied track suits that were once the unofficial uniform of the Mahdi Army, some seem willing to return to the fight.

Before al- Zamili arrived, they had just received news—later denied by aides to al-Maliki—that a court had reissued an arrest warrant for al-Sadr, who is believed to be in Iran, should he return to Iraq. As angry denunciations rang in the smoke-filled room, one burly young man made it clear that Sadrists would not stand for any such action.

“;We had Maliki surrounded in Basra when he visited and could not get him,”; he said. “;But this time, if this report is true, we will go to the Green Zone and pull him out by his head and roll him in the street.”;