In his posting on Armslist, a classified gun sales website from Oklahoma, Haughton wrote he was "looking to buy asap" and "have ASAP now and willing to buy now. I am mobile." Haughton first tried to buy an AK-47 assault rifle, but the seller, Andy Fallon, became suspicious, according to the complaint.
Haughton then contacted Devin Linn to buy a .40-caliber handgun Linn had posted for sale. Haughton also said he needed high-capacity magazines. The pair met and made the deal in the front seat of Linn's car in a McDonald's parking lot in Germantown on Oct. 20, 2012, the day before the shooting. Haughton paid Linn $500 for the gun and magazines. Linn did not return calls for comment Thursday.
Haughton was able to buy a gun despite a Milwaukee County judge issuing a restraining order against him just three days before the shooting. The restraining order barred him under federal law from owning a firearm or buying one from a gun dealer.
Haughton sidestepped the federal law by purchasing the gun privately.
Private sellers are not required to run background checks and do not have to follow a 48-hour waiting period, required at the time of the shooting for gun dealers in Wisconsin. The waiting period was intended, in part, as a cooling-off period in domestic violence cases.
That waiting period was eliminated in a bill passed by the Legislature and signed by Gov. Scott Walker over summer.