MANCHESTER, N.H. — A man who took hostages at a Hillary Rodham Clinton presidential campaign office in 2007 escaped from a minimum-security correctional facility on Sunday, authorities said.

Leeland Eisenberg was discovered missing during an afternoon head count at the Calumet Transitional Housing Unit in Manchester, state Department of Corrections spokesman Jeff Lyons said.

Eisenberg was sentenced in May 2010 to 3 1/2 to 7 years for probation violations. The 52-year-old would have been eligible for parole in August.

Once he is found, he will be charged with escape, a felony punishable by 3 1/2 to 7 years in prison, Lyons said. Eisenberg isn’t considered armed.

Eisenberg spent about two years behind bars for the November 2007 siege at Clinton’s Rochester campaign office in which he claimed to have a bomb. No one was hurt in a five-hour standoff and the bomb turned out to be road flares.

At his arraignment in that case, public defender Randy Hawkes portrayed Eisenberg as a man at the end of his rope emotionally after being repeatedly turned down when he sought psychiatric help.

Eisenberg “heard voices and saw a movie in his head telling him he had to sacrifice himself” to shine light on the flaws in the health care system, Hawkes said.

Eisenberg was released on probation in November 2009. His first violation occurred soon after his release, when he failed to charge his monitoring bracelet. He was incarcerated in January 2010 after failing to take mandatory alcohol breath tests.

In February 2010, he cut off his electronic monitoring bracelet and fled, a day after being given a last chance at freedom by a judge who released him despite multiple probation violations. He was found in his Dover apartment the next day.

Eisenberg’s long criminal record also includes two rape convictions.

He was sentenced to 10 years for rape in Worcester, Mass., in 1985 but escaped the next year and committed another rape, prosecutors said. He was sentenced to 11 to 20 years for that. He was released from prison in March 2005.

Also on HuffPost:

Loading Slideshow...

  • Alabama State Capitol (Montgomery, Ala.)

    Pictured on Tuesday, Feb. 7, 2012. (AP Photo/Dave Martin)

  • Alaska State Capitol (Juneau, Alaska)

    Pictured on Tuesday, Jan. 18, 2011. (AP Photo/Chris Miller)

  • Arizona State Capitol (Phoenix)

    Pictured on Friday, April 23, 2010. (Photo by John Moore/Getty Images)

  • Arkansas State Capitol (Little Rock, Ark.)

    Pictured on Wednesday, Nov. 30, 2011. (AP Photo/Danny Johnston)

  • California State Capitol (Sacramento, Calif.)

    Pictured on Thursday, Jan. 5, 2006. (Photo by David Paul Morris/Getty Images)

  • Colorado State Capitol (Denver)

    Pictured on Thursday, Oct. 26, 2006. (Photo by Doug Pensinger/Getty Images)

  • Connecticut State Capitol (Hartford, Conn.)

    Pictured on Tuesday, Feb. 7, 1999. (AP Photo/Bob Child)

  • Delaware State Capitol (Dover, Del.)

  • Florida State Capitol (Tallahassee, Fla.)

    Pictured on Monday, Jan. 3, 2011. (AP Photo/John Raoux)

  • Georgia State Capitol (Atlanta)

    Pictured on Tuesday, November 13, 2007. (Photo by Jessica McGowan/Getty Images)

  • Hawaii State Capitol (Honolulu)

  • Idaho State Capitol (Boise, Idaho)

    Pictured on Monday, Jan. 14, 2008. (Ned Dishman/NBAE via Getty Images)

  • Illinois State Capitol (Springfield, Ill.)

    Pictured on Tuesday, Sept. 21, 2004. (AP Photo/Seth Perlman)

  • Indiana State Capitol (Indianapolis)

    Pictured on Saturday, Feb. 4, 2012. (Photo by Jeff Gross/Getty Images)

  • Iowa State Capitol (Des Moines, Iowa)

    Pictured on Wednesday, Aug. 10, 2011. (Photo by Chip Somodevilla/Getty Images)

  • Kansas State Capitol (Topeka, Kan.)

    Pictured on Thursday, April 15, 2010. (AP Photo/Orlin Wagner)

  • Kentucky State Capitol (Frankfort, Ky.)

    Pictured on Wednesday, April 12, 2006. (AP Photo/James Crisp)

  • Louisiana State Capitol (Baton Rouge, La.)

    Pictured on Monday, Jan. 14, 2008. (Matthew HINTON/AFP/Getty Images)

  • Maine State Capitol (Augusta, Me.)

    Pictured on Monday, Oct. 17, 2011. (AP Photo/Pat Wellenbach)

  • Maryland State House (Annapolis, Md.)

    (Photo by Patrick Smith/Getty Images)

  • Massachusetts State House (Boston)

    Pictured on Tuesday, Jan. 2, 2007. (Photo by Darren McCollester/Getty Images)

  • Michigan State Capitol (Lansing, Mich.)

    Pictured on Wednesday, April 13, 2011. (Photo by Bill Pugliano/Getty Images)

  • Minnesota State Capitol (St. Paul, Minn.)

    Pictured on Friday, July 1, 2011. (Photo by Hannah Foslien/Getty Images)

  • Mississippi State Capitol (Jackson, Miss.)

    Pictured on Thursday, June 10, 1999. (AP Photo/Rogelio Solis)

  • Missouri State Capitol (Jefferson City, Mo.)

    Pictured on Friday, Oct. 16, 2000. (Photo credit should read ORLIN WAGNER/AFP/Getty Images)

  • Montana State Capitol (Helena, Mont.)

  • Nebraska State Capitol (Lincoln, Neb.)

    Pictured on Wednesday, Nov. 25, 1998. (AP Photo/S.E. McKee)

  • Nevada State Capitol (Carson City, Nev.)

  • New Hampshire State House (Concord, N.H.)

    Pictured on Friday, Dec. 28, 2001. (Todd Warshaw//Pool/Getty Images

  • New Jersey State House (Trenton, N.J.)

    Pictured on Friday, Aug. 13, 2004. (Photo by Chris Hondros/Getty Images)

  • New Mexico State Capitol (Santa Fe, N.M.)

  • New York State Capitol (Albany, N.Y.)

    Pictured on Sunday, March 16, 2008. (Photo by Daniel Barry/Getty Images)

  • North Carolina State Capitol (Raleigh, N.C.)

    Pictured in 1930. (AP Photo)

  • North Dakota State Capitol (Bismarck, N.D.)

    Pictured on Thursday, April 19, 2012. (AP Photo/Dale Wetzel)

  • Ohio Statehouse (Columbus, Ohio)

    Pictured on Tuesday, March 8, 2011. (Photo by Mike Munden/Getty Images)

  • Oklahoma State Capitol (Oklahoma City)

    Pictured on Wednesday, Feb. 29, 2012. (AP Photo/Sue Ogrocki)

  • Oregon State Capitol (Salem, Ore.)

    Pictured on Friday, May 20, 2011. (AP Photo/Rick Bowmer, file)

  • Pennsylvania State Capitol (Harrisburg, Pa.)

    Pictured on Thursday, June 28, 2012. (BRIGITTE DUSSEAU/AFP/GettyImages)

  • Rhode Island State House (Providence, R.I.)

    Pictured on Wednesday, Aug. 1, 1945. (AP Photo)

  • South Carolina State House (Columbia, S.C.)

    Pictured on Monday, Jan. 21, 2008. (Photo by Chris Hondros/Getty Images)

  • South Dakota State Capitol (Pierre, S.D.)

    Pictured on Tuesday, Jan. 10, 2012. (AP Photo/Doug Dreyer)

  • Tennessee State Capitol (Nashville, Tenn.)

    Pictured on Tuesday, Sept. 30, 1941. (AP Photo)

  • Texas State Capitol (Austin, Texas)

    Pictured on Tuesday, Oct. 4, 2011. (MIRA OBERMAN/AFP/Getty Images)

  • Utah State Capitol (Salt Lake City)

    Pictured on Thursday, March 15, 2001. (GEORGE FREY/AFP/Getty Images)

  • Vermont State House (Montpelier, Vt.)

    Pictured on April 9, 1953. (AP Photo/Francis C. Curtin)

  • Virginia State Capitol (Richmond, Va.)

    Pictured on Wednesday, May 2, 2007. (Photo by Chris Jackson/Getty Images)

  • Washington State Capitol (Olympia, Wash.)

    Pictured on Wednesday, Jan. 18, 2012. (AP Photo/Rachel La Corte)

  • West Virginia State Capitol (Charleston, W.V.)

    Pictured on July 2, 2010. (MANDEL NGAN/AFP/Getty Images)

  • Wisconsin State Capitol (Madison, Wis.)

    Pictured on Saturday, Dec. 24, 2011. (KAREN BLEIER/AFP/Getty Images)

  • Wyoming State Capitol (Cheyenne, Wyo.)

    Pictured on Tuesday, March 6, 2001. (Photo by Michael Smith/Newsmakers)