(Reuters) – New Jersey prosecutors on Friday said they would not pursue criminal misconduct charges against Governor Chris Christie in connection with the “Bridgegate” scandal.

The Office of the Bergen County Prosecutor said in a letter to a local judge it did not have sufficient evidence to prove allegations that Christie knew about a plot to close lanes at the George Washington Bridge in 2013 in order to punish a local mayor for failing to endorse Christie’s re-election bid.

“The reason is simple, but compelling – that charge cannot be proven beyond a reasonable doubt,” the letter said.

Bill Brennan, a retired firefighter and activist who announced he would run for governor this year, filed the citizen complaint against Christie last September.

Two former Christie allies were convicted last year of orchestrating the lane closure plot, and U.S. prosecutors introduced evidence at trial suggesting the governor was at least aware of the scheme. Christie has steadfastly denied that he knew about the closures at the time.

Roy McGeady, a municipal judge in Fort Lee, had found probable cause to allow the case against Christie to proceed after a hearing at which Brennan testified. Christie’s lawyer was not permitted to argue or cross-examine, McGeady said, because the governor was not a defendant until probable cause was established.

Bergen County Superior Court Judge Bonnie Mizdol rejected Christie’s subsequent request to toss the complaint outright. But she agreed with both Christie’s lawyers and county prosecutors that McGeady erroneously denied the governor’s attorney an opportunity to participate.

The Bergen County Prosecutor’s Office said in the letter that citizen complaints typically allege minor crimes of which the complainant has personal knowledge. The letter said criminal misconduct was far outside that scope.

“In short, a matter of this gravity should not have been heard by a municipal court judge,” the letter said.

Brian Murray, a spokesman for Christie, applauded the decision on Friday.

“The Governor is gratified that the Bergen County Prosecutor’s Office has ended this baseless fiasco began by Mr. Brennan and perpetuated by Judge McGeady,” Murray said in a statement. “It is right and appropriate that this injustice against the Governor is finally over.”

(Reporting by Curtis Skinner in San Francisco; Editing by Leslie Adler)

IMAGE: U.S. Republican presidential candidate and New Jersey Governor Chris Christie looks on at his primary election night party Nashua, New Hampshire, February 9, 2016. REUTERS/Gretchen Ertl