The Seventh Circuit recently examined the nature and scope of the legal duty owed by an Internet retailer to prevent a criminal attack on a third party. In Vesely v. Armslist, LLC, (http://docs.justia.com/cases/federal/appellate-courts/ca7/13-3505/13-3505-2014-08-12.pdf) the plaintiff filed a wrongful death suit on behalf of his sister who was murdered by someone who purchased a handgun on Armslist.com …