Former Atlanta Fire Chief Kelvin Cochran filed a federal civil rights lawsuit against Mayor Kasim Reed and the city, saying he was terminated in 2015 because of his religion.

Attorneys with faith-based nonprofit Alliance Defending Freedom are representing Cochran in the suit, filed in a U.S. District Court. They say Cochran's self-authored religious book, which contained controversial passages about homosexuality, cost him his job.

The mayor has repeatedly said Cochran's judgment — and not his faith — is why he was terminated after serving a 30-day suspension without pay.