(CNN) - Sarah Palin has her doubts about Chris Christie.
The former Alaska governor, who resigned during her first term, suggested the New Jersey Republican should have been aware of the scandal that's now roiling his administration.
"It's hard to be the CEO of an organization and not know what the closest people to you are up to," she said this week in an interview with Inside Edition. "It's tough not to know. I know when I was mayor and manager of this city and then governor of the state, certainly you know what your top aides are up to."
"I just hope that truth is being told right now," she added.
Christie's office declined to comment on her remarks.
Palin and Christie haven't been the best of friends. In the past year, she's referred to his weight as "extreme" and argued he wasn't "rogue." She said his confrontational reputation amounts to nothing more than a "schtick" set up by his office and he's a "go-along-to-get-along" type of politician who favors more government.
Christie denies having any involvement or knowledge of the decision to close access lanes to the George Washington Bridge–the nation's busiest–last year. The lane closures and resulting traffic gridlock turned the city of Fort Lee into a parking lot for days.
The governor fired some of his top aides after emails surfaced that suggested they had orchestrated the traffic jam as a political vendetta against the Democratic mayor of Fort Lee after he didn't endorse Christie's re-election bid.
Christie's office is now under investigation by a state legislative committee with subpoena power and the U.S. Attorney's Office in New Jersey.
While Palin isn't so sure about Christie, Gov. Scott Walker of Wisconsin came to the New Jersey Republican's defense, saying Christie should keep his post as chairman of the Republican Governors Association.
Walker said he spoke to Christie the same day of his epic two-hour press conference last month.
"He told me the same thing in private that he did to the press in New Jersey, and I have every reason to believe that the information he said is consistent with the truth, and so I still support him in his role as governor and his role in the RGA," he told CNN affiliate WISN.