The family of a former NFL star has filed a wrongful death lawsuit against the National Football League, claiming that head trauma the football player suffered during his career led to a brain injury that caused him to commit suicide. Junior Seau, 43, died at his own hand in May after being diagnosed with CTE, or chronic traumatic encephalopathy, a condition caused by repeated blows to the head. The lawsuit claims that the NFL deliberately concealed evidence of the risks associated with head trauma from players although the organization was aware that repeated hits could lead to permanent damage. The suit is one of more than 175 cases filed over concussion injuries sustained by football players. The family is also suing Riddell Inc., the manufacturer of helmets used by NFL players, claiming that the helmets are unsafe.