The Florida professor who was fired after claiming the massacre of children at a Connecticut elementary school was staged has filed a lawsuit against the university.

James Tracy, who taught students about conspiracy theories at Florida Atlantic University's School of Communication and Multimedia Studies, was served a notice of termination in January.

Now he is suing the school for wrongful dismissal and violation of his First Amendment right to free speech, CBS reports.

Tracy was fired after publishing a series of blog posts claiming the massacre at Sandy Hook Elementary School on December 14, 2012, was staged to intensify feelings against guns.

James Tracy, who taught at Florida Atlantic University, was fired in January for claiming Sandy Hook was staged by the government as anti-gun propaganda. He has now sued the school for violating his 'free speech'

Gunman Adam Lanza shot dead 26 people, including 20 children.

But Tracy wrote on his blog that he did not believe the media narrative.

Soon after, he started harassing the parents of six-year-old Noah Pozner - one of 20 children killed in the attack - demanding proof that the child ever existed.

Tracy has also questioned accounts of other mass slayings in his blog.

Addressing Sandy Hook, he said he felt conflicting media reports from the day of shooting lead him to question whether it happened at all.

Tracy insinuated 'corporate media' institutions, as well as government authorities, spun official accounts of the massacre to drive a preconceived agenda of gun control in America.

'As documents relating to the Sandy Hook shooting continue to be assessed and interpreted by independent researchers there is a growing awareness that the media coverage of the massacre of 26 children and adults was intended primarily for public consumption to further larger political ends,' he wrote on his blog.

As part of the theory the massacre never happened, Tracy questioned whether Noah Pozner (left) - one of the 20 children shot dead by crazed gunman Adam Lanza (right) - ever existed, demanding proof from his parents

A total of 26 people were killed in the Sandy Hook massacre on December 14, 2012, with 20 children and six staff shot dead by Lanza

A total of 26 people were killed in the Sandy Hook massacre on December 14, 2012, with 20 children and six staff shot dead by Lanza.

Prior to driving to the school, Lanza shot and killed his mother at their Newtown home. Lanza killed himself inside the school as first responders arrived.

The school sent Tracy a notice of proposed discipline in December 2015, with ten days to respond.

School officials did not say whether he had replied before his contract was ultimately terminated in January.