Killing a King: The Assassination of Yitzhak Rabin and the Remaking of Israel by Dan Ephron:
Amir had no real plan. But as he drew closer to the stage, he spotted the prime minister’s two cars parked in the lot, the Cadillac and the Caprice. The lot teemed with people, including policemen and security guards but also roadies and drivers, and just bystanders hoping to catch a glimpse of some famous person. The police barricade blocked the entrance only partially and the men who guarded it seemed to come and go. Amir was about to make his way in when he spotted a fellow law student from Bar-Ilan, the careful note-taker Amit Hampel, and quickly retreated. Hampel would wonder what he was doing at a peace rally and why he was not wearing his skullcap, Amir thought. He might become suspicious.