Trials: A Deadly Iteration

These tortured meditations of Senator Robert Kennedy's assassin jump in a schoolboyish scribble across the 9-by-12-in. pages of the spiral-bound notebooks that served Sirhan Bishara Sirhan as a diary. Meandering on and on in an unpunctuated stream of consciousness, they speak of death. My determination to eliminate R.F.K. is becoming more the more of an unshakable obsession, wrote Sirhan.

To Sirhan's prosecutors, painstakingly winding up their meticulous case last week in Los Angeles after nine days of testimony, the date at the head of the diary's page — May 18, 1968 —...