New details about the day gunman Michael Zehaf-Bibeau shot Cpl. Nathan Cirillo at the National War Memorial before storming Parliament Hill in a chaotic shootout that led to his death are expected today with the release of police reports.

Redacted versions of Ontario Provincial Police findings, as well as an RCMP internal "after-action review" and a House of Commons summary on the response to the shooting will be released in a media lockup in Ottawa at noon. will livestream the reports' release, as House of Commons Speaker Andrew Scheer, Senate Speaker Leo Housakos and the RCMP Assistant-Commissioner Gilles Michaud take questions from the media.

The provincial police review includes the dramatic events on Oct. 22 inside Centre Block, where Zehaf-Bibeau ran past rooms where both the Conservative and NDP caucuses were meeting before the shooter was killed in a hail of gunfire just outside the Parliamentary Library.

CBC News has learned the report will reveal that Zehaf-Bibeau was shot 31 times during his attack.

The provincial police also reviewed the events outside the Centre Block after Zehaf-Bibeau gunned down Cirillo less than a block away.

The findings are expected to detail a number of security gaps, including a lack of officers in key positions, an inadequate number of video cameras inside Centre Block, and no single radio communication system that would allow the RCMP, Ottawa police and the parliamentary security officers to communicate with each other.

An earlier Ottawa police report revealed that the sheer scale of the police response on Oct. 22 contributed to confusion about how many suspects were involved. More than 300 Ottawa police officers responded to the shooting, including dozens who deployed themselves.

Since the shooting, the government has moved to create a Parliamentary Protective Service under the RCMP to take over sole responsibility for security in and around Parliament Hill.