(Providence, RI) -- A Providence man is suing the Providence Police Department and the state of Rhode Island for wrongly implicating and imprisoning him for a murder he didn't commit. "The Providence Journal" reports Wilbert Richardson filed the suit last week in federal court. Richardson was imprisoned for over a year-and-a-half for the stabbing death of Delor Cabral in 2013 before the state realized it lacked evidence. Richardson is seeking unspecified damages and is asking the court to direct the city and state to be better-trained.