Original sentence: On May 1, 2020, in the wake of a mass killing in Nova Scotia, Prime Minister Justin Trudeau announced that the Government of Canada would immediately ban around 1,500 models of "military-grade assault style weapons", mostly rifles, via an order in council under the authority of the Criminal Code
Edited sentence: On May 1, 2020, after mass killing in Nova Scotia, where the shooter used illegally imported/smuggled weapons and was not licensed to have firearms, Prime Minister Justin Trudeau announced that the Government of Canada would immediately ban law abiding Canadians from owning around 1,500 models of "military-grade assault style weapons", but instead began banning hunting and sporting/target   rifles, via an order in council under the authority of the Criminal Code