The police say they have no clear motive for the shooting but felt that the delay at getting the passport and his radicalization contributed to Zehaf-Bibeau's actions on Wednesday.

INSKEEP: How much more did the mother say?

NORTHAM: The police did not provide many details. But Zehaf-Bibeau's parents gave an interview to The Associated Press, and they apologized for the pain and the chaos that their son caused. His mother, Susan Bibeau, said she had seen her son last week. And it was the first time in five years that she had seen him, and they had lunch. She said she had very little insight about him. But she called him a lost soul and that he did not fit in. And she also said she was very angry withhim over the shooting.

INSKEEP: Well, let's just keep reconstructing the sequence of events here. He's talking to his mother. He says he want to go to Syria. He has some kind of passport trouble there in Ottawa. And then he heads to Canada's war memorial and the parliament building. What happened then?

NORTHAM: Well, there's a surveillance video to show what happened then. And it's shown from three cameras. It was taken after Zehaf-Bibeau had shot the honor guard at the war memorial about one block away. And you can see Zehaf-Bibeau quickly pull up in a car in front of the parliament grounds. He leaps out of the car holding a rifle, and people on the street flee when they see the gun. Zehaf-Bibeau runs up the driveway.