James Soto was imprisoned for over 42 years for a murder he said he did not commit.
Soto's conviction and that of his cousin, David Ayala, were thrown out last December. They both served possibly the longest time of anyone on a wrongful conviction in Illinois.
The judge who vacated the convictions said the two did not receive adequate counsel after the murders of a marine and a teenager in 1981.
Soto and his lawyers Tuesday filed a federal lawsuit against those they say framed him.
The suit, which civil rights firm Loevy & Loevy filed, seeks damages from dozens of Chicago police officers, three Cook County assistant state's attorneys, Cook County and the city of Chicago.
Soto and his lawyers spoke on the filing Tuesday afternoon.
This is a developing story; check back with ABC7 Chicago for updates.