OTTAWA — For the first time since a gunman killed a ceremonial military honor guard and then stormed Parliament, hockey returned to Canada’s capital and the Parliamentary grounds reopened to the public, as the man who many, if not most, Canadians view as the hero of the crisis dealt with his newfound celebrity.

As routine resumed in Ottawa, Commissioner Bob Paulson of the Royal Canadian Mounted Police said in a statement Sunday evening that Michael Zehaf-Bibeau had made a video shortly before his armed assault, in which he killed a guard at the National War Memorial. While the police did not release the video and Mr. Paulson did not describe its contents, he said it was “persuasive evidence that Michael Zehaf-Bibeau’s attack was driven by ideological and political motives.”

The statement also answered questions about how an unemployed man who lived in homeless shelters had been able to travel across Canada and buy a secondhand car to use to carry out the attack. Mr. Paulson said that Mr. Zehaf-Bibeau had worked in Alberta’s booming oil fields and was living off savings from that period. “He had access to a considerable amount of funds,” Mr. Paulson said, adding that the gunman had also taken a knife from his aunt’s property in Mont Tremblant, Quebec, which he visited, unannounced, the night before the attack.

The weekend also brought further details about Kevin Vickers, the sergeant-at-arms in the House of Commons, which suggested that his role in bringing the attack on Wednesday to an end resembled elements from an action film. More also emerged about how members of Parliament, who were meeting in rooms immediately outside of a gunfight, prepared for battle.