Police detained around 1,000 people during the G20 summit weekend in late June. (Reuters)

The Toronto Police Services Board is seeking input from the public as it determines the scope of an external review of the conduct of law enforcement officials during G20 summit protests.

The board, a civilian agency overseeing the police force, will release more details about the review at a public meeting on Thursday.

It is expected to announce that lawyer Douglas Hunt, formerly the assistant deputy attorney general of Ontario, will oversee the drafting of the review's terms of reference.

"He comes with a great deal of experience and he's an expert on the Police Services Act," said board Chair Alok Mukherjee.

"It is extremely important that we have very clear and specific terms of reference, because without them, the reviewer will not have any guidance."

Hunt will not lead the review — he is charged only with determining its parameters. The board will name the reviewer in August.

Mukherjee said he's been in touch with several candidates who all have judicial experience, but declined to name any of them.

Mandate 'must include' transparency

Toronto police have come under withering criticism from civil liberties groups and protesters over their handling of protests during the summit, which ran June 26-27 in downtown Toronto. Nearly 1,000 people were arrested in connection with G20 protests.

Lawyer Natalie Des Rosiers will speak for the Canadian Civil Liberties Association at Thursday's meeting.

"The mandate for us must include the transparency of the communication by the Toronto police," she said.

"It must look at their policies on mass arrests."

Some of the limitations of the review have already been determined.

The probe will review policy, oversight and governance, not specific operational issues. The police service is conducting an internal review into operations during the summit.

Won't investigate other police forces

It also won't investigate other police forces working in the city that weekend, like the RCMP or the Ontario Provincial Police.

The board won't be hearing complaints about personal experiences with police officers during the G20 summit — that's the job of the provincial police watchdog, the Ontario Independent Review Director.

The review is also not a full public inquiry, which has been demanded by many critics of police actions during the G20. The review is not legally binding, although Toronto police Chief Bill Blair will have to answer to the board.

Meanwhile, Ontario Ombudsman Andre Marin is investigating the provincial government's introduction of a new regulation that gave police expanded powers in the security area ahead of the summit.