Updated

Addam Swapp, the man who bombed a Mormon church building and sparked a 13-day standoff in 1988 that left a corrections officer dead at a polygamist compound, was released from prison on Tuesday after more than 25 years behind bars.

Swapp, 52, was accompanied by family members as he left Sanpete County Jail three months after members of the state board of pardons and parole approved his release, saying he had shown remorse for leading the standoff in Marion.

At his September parole hearing, Swapp apologized and said he planned to join his wife Charlotte and wanted to use his freedom to live peacefully and "be a blessing to my fellow man."

"I desire when I get out of prison to live my life in such a manner that my family, friends, neighbors and community would find my presence in their lives a benefit and a blessing," Swapp said in a written statement, according to a transcript of the hearing posted online by The Salt Lake Tribune.

Swapp said he was a different man after serving time in state and federal prisons for manslaughter, attempted murder, possessing a bomb and other offenses.

"My core beliefs have completely changed," he said. "I am completely opposed to the violent acts I committed which got me sent to prison."

The standoff began after Swapp detonated 87 sticks of dynamite at a Mormon church building in Kamas on Jan. 16, 1988. Swapp claimed it would lead to the overthrow of The Church of Jesus Christ of Latter-day Saints and resurrect his father-in-law, John Singer, who was killed by police at the Marion compound in 1979.

Authorities said Singer was fatally shot when he pointed a gun at officers trying to arrest him over his refusal to send his children to public schools. Singer, 48, was a practicing polygamist and blamed the LDS church for his legal problems after he was excommunicated.

Swapp claimed he had a revelation that Singer would return to life on the ninth anniversary of his death, which was barely two weeks away.

Swapp, who went on to marry two of Singer's daughters, holed up in Singer's compound following the bombing. Nine children were among the 14 people barricaded with him in a log cabin. More than 100 officers surrounded the property after following tracks in the snow.

Throughout the standoff, officers flashed bright lights and circled in noisy snowmobiles in the middle of the night to psychologically weaken members of the Singer-Swapp clan. They resisted by shooting out police floodlights and used a lantern and mirrors to flash a crude Morse code message, "Cops not telling truth."

Shortly after dawn on Jan. 28, 1988, the showdown ended in a gun battle.

Lt. Fred House, a dog handler with the state corrections department, was killed after he was struck by a bullet between armored plates in his flak jacket. House was shot by Singer's son, John T. Singer, who was released from prison in 2006 after serving time on state and federal charges that included manslaughter and attempted murder.

Swapp was shot in the arm and chest during the shootout and waved a white towel through the doorway to surrender. The shootout was later recounted in a made-for-TV movie.

During court appearances, Swapp donned a buckskin coat fashioned by his wives that featured Indian signs, geometric symbols and a flag designed by his deceased father-in-law. He told the Salt Lake Tribune at the time that he believed God had chosen him to gather American Indians for the second coming of Christ. John Singer, he said, would be resurrected and unite lost tribes of Israel.

Swapp served 17 years in federal prison before starting a state sentence in 2006. Officials opted to house him in Arizona rather than Utah because of his ties to a state officer's death.

At his September parole hearing, Swapp wept and issued a long apology, including statements directed at the House family, the Tribune reported.

Ann House, the widow of Fred House, sent a letter to the parole board accepting his apology and saying she felt he had been imprisoned long enough.

"Breaking down of my wrongful beliefs and replacing them with truly Christ-centered beliefs has been a long, slow process," Swapp said in his statement. "The end result is that I have come away with a complete change of heart and a radically new way of looking at life."

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Follow Michelle Price at http://www.twitter.com/michellelprice.