TGSCOM Inc., an online weapons dealer based in Green Bay, is defending itself in regards to some of the notorious mass killers who have purchased guns from them. This includes: George Sodini, who this week killed several people and himself in a Pittsburgh area LA Fitness; Seung-Hui Cho, who killed 32 at Virginia Tech in 2007; and Stephen Kazmierczak, who killed five people and himself in a classroom in 2008.

TGSCOM spokesman Eric Thompson says the weapons could have been easily found at a number of large department stores. Sodini may or may not have used TGSCOM-bought guns in his attack.