I'll try to be brief.
During my time in the Toronto Police Service, both as the chief of detectives and then for 10 years as the chief of police, we made an effort to trace the origin of all guns that were used in crime in our city.
During that period of time, some 13 years, the evidence was very strong and fairly consistent. About 70% of the crime guns we came in possession of had been smuggled across the border. Also, because we traced the origin of those guns, we were able to determine if they were domestically sourced, if they had been brought legally into this country, purchased and acquired legally, and then ended up in the hands of criminals.
I can also tell you from my experience that, in a significant number of cases, there have been thefts of lawfully owned and possessed guns, and those guns have been subsequently used in criminal offences by people who resolve their disputes through violence, and there have been other means of diversion as well.
In my experience, about 70% were across the border, and 30% domestic. When we use the figure of 50%, we are relying on information. First of all, the current chief of police in Toronto says it's about 50%. I've also heard from the Regina police chief, Chief Evan Bray, who said that, in Saskatchewan, 50% of the firearms they seized were domestically sourced as well.