An attorney representing the organizers of south Boston's St. Patrick's Day parade is now alleging that Mayor Martin Walsh forced his clients into inviting an LGBT veterans group to march in the parade two years ago.

Chester Darling said Tuesday that he filed an amended complaint to an earlier civil lawsuit accusing Walsh of strong-arming organizers in 2014 through a series of thinly veiled threats.

The parade has long been embroiled in legal controversy, including a 1995 ruling allowing members of the South Boston Allied War Veterans Council from excluding groups on the grounds of free speech.

The lawsuit claims that Walsh ignored the court's order and violated the council's civil rights. Walsh maintains that he was within his legal rights to encourage organizers to allow OUTVETS to march.