November 1994-January 1995 - Makes a trip to the Philippines where his wife Marife and daughter Nicole are living. Before leaving, gives his ex-wife Lana letters and instructions for McVeigh, which are to be read if he doesn't return from the Philippines.
April 19, 1995 - A bomb explodes at the Alfred P. Murrah Federal Building in Oklahoma City, killing 168 people.
April 21, 1995 - Surrenders to Kansas police when he hears they are looking for him in connection with McVeigh.
December 23, 1997 - Is found guilty on federal charges of conspiracy to use a weapon of mass destruction and on eight counts of involuntary manslaughter in the 1995 bombing of the Alfred P. Murrah Federal Building in Oklahoma City.
June 4, 1998 - Judge Richard Matsch sentences Nichols to life in prison without parole after the federal jury is unable to decide on the death penalty or a life sentence.
September 13, 1999 - A federal judge rejects Nichols' request for a new federal trial.
September 5, 2001 - The Oklahoma County District Attorney announces that Nichols will face a state trial for his role in the bombing. District Attorney C. Wesley Lane says he is going forward with the trial because he is concerned the federal conviction will be overturned.
February 26, 2004 - A judge rules that David Paul Hammer, an inmate who claims Timothy McVeigh shared with him the names of others involved in the bombing, can testify at Nichols' trial.
March 22, 2004 - Nichols' state trial opens.
April 20, 2004 - Michael Fortier testifies that Timothy McVeigh asked him to help build the bomb because "Terry was backing out." Fortier was sentenced to 12 years in prison as part of a plea deal for testifying against McVeigh and Nichols.
May 26, 2004 - Nichols is found guilty in Oklahoma state court on 161 counts of murder. The jury spent five hours deliberating before announcing the verdict.
June 1, 2004 - Penalty phase of trial begins.
June 11, 2004 - The jury in Nichols' state trial says it is deadlocked over a sentence of life in prison or death by lethal injection. The decision now falls to Pittsburg County District Judge Steven Taylor, and by law, his options are limited to life in prison, with or without the chance for parole.
August 9, 2004 - District Judge Steven Taylor sentences Nichols to 161 consecutive life terms, without the possibility of parole.
April 1, 2005 - The FBI finds residual bomb making material in Nichols' former residence, not detected in previous searches.
May 4, 2005 - In a letter written from his Colorado prison cell, Nichols names Arkansas gun collector Roger Moore as the man who supplied him and Timothy McVeigh with bomb components. Moore denies any involvement.
February 22, 2007 - In a declaration filed in U.S. District Court in Salt Lake City, Nichols accuses Larry Potts, an FBI official, of having taken part in the 1995 bombing.
November 2007 - A Utah lawyer, Jesse Trentadue, interviews Nichols in regards to the death of Trentadue's brother while in federal custody in 1995. Trentadue believes his brother Kenneth Trentadue died during an FBI interrogation when agents confused him for a suspect connected to the investigation of the Oklahoma City bombing.
September 27, 2008 - A judge upholds the approval of a taped interview with Nichols in the death of Trentadue's brother.
November 6, 2008 - The FBI appeals an order allowing Jesse Trentadue to interview Nichols on video tape. The 10th U.S. Circuit Court of Appeals later overturns the ruling and bars the taped deposition.
March 16, 2009 - Files a 39-page handwritten lawsuit against the Colorado prison where he is staying for violating his religious and physical dietary needs by not giving him whole foods. In the lawsuit Nichols requests 100 percent whole-grain foods, fresh raw vegetables and fruit, a wheat bran supplement and digestive bacteria and enzymes.
February 2010 - Goes on a fast, protesting the processed foods he is being served in prison.
August 12, 2010 - U.S. District Judge Christine M. Arguello dismisses Nichols' lawsuit over prison food.
November 28, 2011 - Jannie Coverdale, grandmother of two victims of the Oklahoma City bombing, reveals she has been corresponding with Nichols for several years and that he apologized and asked for her forgiveness, which he received. In copies of the letters published in The Oklahoman, Nichols admits he knew there was to be a bombing but didn't know the federal building was the target and that the building would be occupied.