The four men and two women, alleged to be ringleaders who organized the violence, each entered a guilty plea to a charge of counseling to commit an indictable offense, the Toronto Star reported. Several of the six also pleaded guilty to charges of counseling to commit mischief over $5,000 and counseling to obstruct police.
The group of 17 alleged organizers each originally faced more serious charges of conspiracy, but the charges were scaled back as part of a broad plea bargain that saw charges against 11 other alleged organizers dropped.
The mayhem June 26 saw scores of windows in Toronto's downtown core smashed and incidents of arson that included the torching of a police car. It was immediately evident to police the violence had been planned since many people captured on video were dressed in black and wore masks, officials said at the time.
In all, 1,118 people were arrested during the summit of world leaders.
Notable deaths of 2014 [PHOTOS]