Wally Oppal studied why it took so long for the Vancouver police and RCMP to identify Pickton as the suspect in B.C.'s missing women case, despite warnings he was preying on sex workers on Vancouver's downtown east side.
The government says the 1,448 page report and its recommendations will be made public in mid December.
Earlier this week, three B.C. advocacy groups declared the inquiry a failure, saying it didn't do enough to include the voices of marginalized women.
Oppal responded by asking the groups to read his report with an open mind.
He said the report will make strong recommendations to better protect the most vulnerable citizens in society.