MADISON, Wis. – An online weapons dealer who sold firearms accessories used in the Northern Illinois shooting and provided equipment in two other mass shootings has quietly closed up shop amid a flurry of complaints from customers who allege he failed to deliver orders after billing them.

Police said Eric Thompson last month abruptly closed his Green Bay, Wis.-based business, TGSCOM Inc., as they probed scores of complaints from customers in nearly every state.

TGSCOM’s connections to three mass shootings have drawn national attention in recent years. Seung-Hui Cho used a .22-caliber handgun purchased through TGSCOM when he killed 32 people at Virginia Tech in April 2007. Steven
Kazmierczak, who killed five people in a Northern Illinois University classroom in 2008, bought two empty magazines and a holster through a company site. George Sodini, who killed three women when he opened fire at a Pittsburgh-area health club in 2009, bought an empty magazine and a magazine loading apparatus from the company.