In September 1992, two Israeli widows went to the home of their lawyer. When the women arrived, the lawyer told them that he had received some photographs during his recent trip to Munich but that he did not think they should view them. When they insisted, he urged them to let him call a doctor who could be present when they did.

Ilana Romano and Ankie Spitzer, whose husbands were among the Israeli athletes held hostage and killed by Palestinian terrorists at the 1972 Olympics in Munich, rejected that request, too. They looked at the pictures that for decades they had been told did not exist, and then agreed never to discuss them publicly.

The attack at the Olympic Village stands as one of sports’ most horrifying episodes. The eight terrorists, representing a branch of the Palestine Liberation Organization, breached the apartments where the Israeli athletes were staying before dawn on Sept. 5, 1972. That began an international nightmare that lasted more than 20 hours and ended with a disastrous failed rescue attempt.

The treatment of the hostages has long been a subject of speculation, but a more vivid — and disturbing — account of the attack is emerging. For the first time, Ms. Romano, Ms. Spitzer and other victims’ family members are choosing to speak openly about documentation previously unknown to the public in an effort to get their loved ones the recognition they believe is deserved.