Miguel Roman's lawsuit, filed last month, also names individual police officers as defendants, The Hartford Courant reported. He charges they ignored evidence suggesting he was not the killer and questioned him in English when he is much more fluent in Spanish.
Pedro Miranda was convicted Tuesday of the murder of Carmen Lopez, 17, in January 1988. Roman was Lopez's boyfriend, while Miranda was involved with Lopez's cousin.
Miranda faces two more trials for allegedly killing teenage girls in 1986 and 1987. He served time in prison for assaulting a woman in 1998.
Roman was released in 2008 and Miranda charged after investigators compared his DNA to evidence from the Lopez killing.
Rosemarie Paine, Roman's lawyer, said Wednesday he lost the life he could have had during the years he was in prison. His son and daughter grew up while he was behind bars.
"He did not get to be the parent he would have liked to have been. That is something he cannot recapture," Paine said.