(Portland, OR) -- Family members of a man who was stabbed to death in an unprovoked attack aboard a MAX train earlier this year are suing TriMet for wrongful death. The estate and family of 51-year-old Michael Brady filed a wrongful death lawsuit in Multnomah County Circuit Court arguing TriMet neglected its duty to ensure the safety of its passengers. Brady was sitting across the aisle from the suspect, Shondel Larkin, in March when Larkin suddenly stood up and started to stab Brady. Larkin was arrested and charged with murder. Brady's estate is seeking noneconomic damages for his pain and suffering as well as compensation for his family's loss.