After Sunday's mass shooting on the Danforth, the issue of illegal guns making headlines again.
Toronto police say prior to 2012, about 75 percent of illegal guns in Canada came from the U-S.
But last year, the numbers changed and now about half of them come from domestic sources.
Toronto detective Rob Di Danieli says legal gun owners can make a quick profit by selling weapons on the black market.
He says one man sold 47 guns and made more than $100,000 in just five months.
No one is sure where 29 year old Faisal Hussain obtained the gun he used Sunday night to killing two people and injure another 13.