The 500-page report by Inspector General Michael Horowitz has presumed that Comey did not exhibit any political bias or attempt to influence the election.
Bloomberg earlier reported, citing a copy of the US Justice Department's watchdog that former FBI Director James Comey had deviated from the bureau's norms, however, he wasn't motivated by political bias.
However, it censured him for infringing Justice Department policies and blamed him for usurping the authority of Attorney General Loretta Lynch when in July 2016 he stated there would be no charges against Clinton for her email use as secretary of state.
The Justice Inspector General says decisions before the 2016 presidential election "negatively impacted" perception of the FBI as being "fair," according to the Bloomberg.
"While we did not find that these decisions were the result of political bias on Comey's part, we nevertheless concluded that by departing so clearly and dramatically from FBI and department norms, the decisions negatively impacted the perception of the FBI and the department as fair administrators of justice," Inspector General Michael Horowitz said in the report's conclusions, which were obtained by Bloomberg.
Comey investigated the case regarding the correspondence of presidential candidate Hilary Clinton, who used a private mail server when she was Secretary of State from 2009-2013.
The FBI conducted an investigation and stated that there was no reason to bring Clinton to justice. Ten days before the presidential election, Comey announced the resumption of the investigation. Later, Clinton said that such actions by the FBI led to her defeat in the 2016 presidential election.
The Special Counsel is probing allegations that Russia interfered in the 2016 US presidential election, as well as accusations that Trump's campaign team colluded with Moscow to affect the outcome of the vote.
Russia has repeatedly refuted the allegations of interference, saying they are groundless and invented to divert public attention away from actual instances of election fraud and corruption as well as other pressing issues.