Relatives of Washington Navy Yard shooting victim sue for $37.5 million

The family of Mary Frances Delorenzo Knight, 51, who died in the Washington Navy Yard shooting in September, filed a negligence lawsuit on Wednesday against two U.S. government agencies, Hewlett-Packard, and a technology subcontractor, seeking $37.5 million in damages. The lawsuit claims the shooting in building 917 by Aaron Alexis, 34, in which Knight and 11 other civilian workers were killed and four wounded, could have been prevented with on-site metal detectors.