The family of a man who was among six people gunned down at his Minneapolis, Minn., office last year is suing the company, claiming it botched the firing of the employee who carried out the attack and should have known from his work history that he was potentially dangerous. The lawsuit being filed on behalf of Jacob Beneke’s family is the first to stem from Sept. 27 attack at Accent Signage Systems, said the family’s attorney, Phil Villaume.