The woman in the polka-dot dress is associated with what assassination?

The assassination of Senator Robert Kennedy, just after midnight on June 5, 1968, in the kitchen of the Ambassador Hotel has left more questions than answers. For instance the fatal shot came from the back while the assassin was in front of him. This has never been explained but theories about a second gunman persisted.

The convicted murderer was a 24 year old Christian Palestinian immigrant named Sirhan Sirhan, who remains incarcerated in Richard J. Donovan Correctional Facility for the crime. Theories of the shooting have also centered on a woman wearing a polka-dot dress claiming responsibility for the crime, and the involvement of the CIA (Central Intelligence Agency).

One witness, Kennedy campaign worker Sandra Serrano, reported that around 11:30 p.m. she was sitting outside on a stairway that led to the Embassy Ballroom when a woman and two men, one of whom Serrano later said was Sirhan, walked past her up the stairs. Serrano said that around 30 minutes later, she heard noises that sounded like the backfire of an automobile, then saw the woman and one of the men running from the scene. She said that the woman exclaimed, "We shot him, we shot him!" According to Serrano, when she asked the woman to whom she referred, the woman said "Senator Robert Kennedy."