Investigating reporter Don Bolles was killed by a bomb because he was one of three men marked for death by a prominent businessman whose political career was cut short by Bolles' reporting, the prosecutor contends.

In opening statements Friday in the trial of two men accused of slaying Bolles, the prosecution said it would show the Arizona Republic reporter was killed because of his expose of the businessman, who has not been charged with any crime.

The defense indicated it will try to show that one defendant, James Robinson, was far away when Bolles was killed in June, 1976, and the other, Max Dunlap, had nothing to do with it.

Prosecutor William Schaefer told the jury that Bolles was killed because he and two other men posed a threat to the security "of one man - Kemper Marley Sr." Marley, a wealthy liquor wholesaler, has not been charged in the case.

Schaefer's 45-minute opening statement to the jury centered around one theme - that Marley wanted Bolles, state Attorney General Bruce Babbitt and a former public relations man for Marley, Alphonso Lisonetz - killed.

Schaefer said Bolles was selected because of stories he wrote about Morley that contributed to the failure re of the 70-year-old millionaire to hold a post on the Aof the 70-year-old millionaire to hold a post on the Arizona Racing Commission to which he was appointed.