A 37-year-old man wrongly imprisoned for 17 years has filed a federal civil rights lawsuit against four former police officials and the city of New Haven, claiming evidence that would have cleared him sat in a detective’s home basement.

Vernon Horn will seek ”eight figures” in the litigation against the city, three former New Haven police detectives and a former firearms examiner employed by the Connecticut State Police Forensic Science Laboratory, stemming from convictions in 2000, according to his attorney. He was released from prison in April after Connecticut Superior Court Judge Patrick Clifford vacated his murder and robbery convictions, on the recommendation of New Haven State’s Attorney Pat Griffin, who said the state no longer had confidence that Horn was responsible for the crimes.