A chronology of the major events in the car-bomb murder of Arizona Republic reporter Don Bolles
June 2, 1976 - Bolles, 47, is gravely wounded when six sticks of dynamite are detonated beneath his compact car in the parking lot of the Hotel Clarendon, 401 W. Clarendon Ave. Bolles, who had been lured to the hotel by the promise of a news tip, whispers the name "Adamson" to his rescuers.
June 13, 1976 - Bolles dies. Phoenix Police arrest John Harvey Adamson, racing-dog owner and former tow-truck operator.
June 16, 1976 - Max Dunlap, a Phoenix contractor, is questioned by Phoenix Police homicide detective Jon Sellers, the lead investigator. Police say Dunlap had been observed delivering cash to Adamson.
Jan. 15, 1977 - In an agreement with prosecutors, Adamson admits planting the remote-control bomb and pleads guilty to second-degree murder. He agrees to cooperate with prosecutors in exchange for a 20-year, two-month prison sentence. Dunlap and James Robison, a Chandler plumber who allegedly helped Adamson by triggering the bomb, are arrested.
July 6, 1977 - Trial begins for Dunlap and Robison, who are charged with first-degree murder. During the trial, Dunlap's attorney tries to cast suspicion on Phoenix attorney Neal Roberts, who had dealings with both Adamson and Dunlap, as the real mastermind in the murder plot.
Nov. 6, 1977 - A jury finds Dunlap and Robison guilty primarily on the strength of Adamson's testimony. They also are found guilty of conspiring to kill then-Arizona Attorney General Bruce Babbitt and advertising man Al Lizanetz. Adamson testifies that Dunlap wanted the three killed because each had angered Dunlap's friend, millionaire rancher and liquor wholesaler Kemper Marley Sr., who never is charged in the case.
Jan. 10, 1978 - Dunlap and Robison are sentenced to death.
Feb. 25, 1980 - The Arizona Supreme Court, saying defense lawyers should have been allowed to question Adamson more closely, overturns the convictions of Dunlap and Robison and orders a new trial.
June 2, 1980 - The murder charge against Dunlap is dismissed after Adamson balks at testifying against him again. Adamson had asked prosecutors to grant him certain concessions, but was denied.
June 6, 1980 - The Arizona Attorney General's Office withdraws Adamson's 1977 plea bargain and reinstates the original charge of first-degree murder.
June 13, 1980 - The murder charge against Robison is dismissed after Adamson refuses to testify.
Oct. 17, 1980 - In a trial held in Tucson, a jury finds Adamson guilty of first-degree murder.
Nov. 14, 1980 - Adamson is sentenced to death.
May 9, 1986 - The 9th U.S. Circuit Court of Appeals in San Francisco overturns Adamson's death sentence, saying that he improperly was condemned to die after a trial judge had ruled that a prison term was appropriate.
Dec. 22, 1988 - Adamson's death sentence having been reinstated, it is again overturned by the circuit court.
Nov. 27, 1989 - After a renewed investigation by the Attorney General's Office, led by investigator George Weisz, Robison is recharged with the murder of Bolles.
June 25, 1990 - Marley, 83, dies of cancer in La Jolla, Calif.
June 28, 1990 - The U.S. Supreme Court leaves intact the 1988 appeals court ruling overturning Adamson's death sentence.
Dec. 19, 1990 - Dunlap is recharged with Bolles' murder. Dunlap and Robison also are charged with conspiring to obstruct a criminal investigation into the slaying. Adamson agrees to testify against the pair in return for the reinstatement of his 1977 plea bargain and 20-year, two-month prison sentence.
Jan. 11, 1993 - Dunlap and Robison are granted separate trials.
March 22, 1993 - An attorney for Dunlap, John Savoy, is sentenced to two years' probation on perjury conviction for telling a grand jury he didn't have any records dating from 1977 related to Dunlap. Prosecutors believed some of the records detailed secret cash payments from Dunlap to Robison's girlfriend.
April 20, 1993 - Dunlap is found guilty of first-degree murder and conspiring to obstruct the investigation of the case, and is later sentenced to life in prison without possibility of parole for 25 years.
Dec. 17, 1993 - Robison is acquitted, despite admitting under cross-examination that he asked a fellow jail inmate to arrange for the murder of Adamson, the chief witness against him.
July 26, 1995 - Robison, having pleaded guilty to soliciting an act of criminal violence for trying to have Adamson killed, is sentenced to five years in federal prison.
Aug. 12, 1996 - Adamson is released from prison and goes into the federal Witness Protection Program, which he will voluntarily leave a few years later.
1998 - Robison, 76, is released from prison.
Jan. 28, 1999 - Phoenix attorney Neal Roberts dies in poverty at the age of 66 of coronary artery disease, cirrhosis and emphysema. His former secretary says Roberts told her he was involved in the Bolles murder at various levels, but investigators say his statements may have been influenced by his heavy drinking and taste for melodrama.