Actually most guns used by criminals are already purchased illegally. Illegal fire arms come across the border, and they receive a lot of it from corrupt gun-runners that work for gun manufacturers. Russia, France, and the US are the largest suppliers of these guns.
The problem here is that if you are taking the guns away from ordinary citizens who are buying this legally, assuming that it will also take away the guns away from those that are attaining it illegally, then all you are really doing is making your citizens more vulnerable.
"I can’t possibly see a situation where more guns could solve the problem."
Oct. 1, 1997
Luke Woodham fatally stabbed his mother at home before opening fire at his high school, killing two students and injuring seven others. The attack was stopped when Assistant Principal Joel Myrick retrieved his .45 caliber handgun from his truck and confronted Woodham, detaining him until authorities could arrive.
April 24, 1998
A 14-year-old student showed up to his middle school dance carrying a .25-caliber pistol. He opened fire inside the dance, killing one teacher and wounding another as well as two students. The rampage ended when James Strand, owner of the banquet hall the dance was happening in, grabbed his personal shotgun and confronted the 14-year-old killer. Strand held the teen at gunpoint for 11 minutes before finally getting him to drop the weapon and lie on the ground and searching him for additional weapons.
Jan. 16, 2002
A 43-year-old former student armed with a .380 handgun killed Dean Anthony Sutin and Professor Thomas Blackwell with point blank shots and went on to kill fellow student Angela Dales as well as wounding three others before being confronted at gunpoint by law students Tracy Bridges, a county sheriff’s deputy, and Mikael Gross, a police officer, after retrieving their personal handguns from their vehicles. The gunman was then apprehended by other students.
Dec. 9, 2007
2 parishioners were killed and 3 wounded when a gunman toting a Bushmaster AR-15 opened fire at New Hope Church. Hearing the rifle fire, Jeanne Assam grabbed her personal concealed carry firearm and confronted the gunman from a distance of 20 yards.
May 27, 2010
A 79-year-old man entered an AT&T store in New York Mills, New York carrying a .357 magnum revolver in his hand and a list of employees he planned to kill in his pocket. Hearing the hand cannon go off, Donald J. Moore drew his own personal weapon and killed the gunman before he could complete his plan. One employee was wounded in the shooting.
March 25, 2012
Aaron Guyton was inside the recreation building of his grandfather’s church when he saw Jessie Gates, a member of the congregation, pulling a shotgun from his vehicle. Guyton leapt into action, locking the doors to the church where services were going on. Gates kicked in the door and pointed the shotgun at Rev. Henry Guyton and several parishioners. Drawing his concealed handgun, the younger Guyton held Gates at gunpoint while two members of the church took him to the ground. Rev. Guyton then took the shotgun from his hand.
Here are just a few examples.