Updated

Defense attorneys for a Montana bride who is accused of pushing her newlywed husband off a cliff in Glacier National Park are asking a federal judge to prevent prosecutors from introducing a new theory that she blindfolded him before he fell to his death.

Michael Donahoe, an attorney for 22-year-old Jordan Graham said in court filings that prosecutors only recently informed him of  their theory that Graham had planned Cody Johnson's death ahead of time by placing a blindfold on him before pushing him off the cliff in July.

Prosecutors told the defense team this theory for the first time in a conference call last month, and that the government is awaiting DNA test results on a piece of cloth found in the same area as Johnson’s body.

Donahoe included a transcript of the recorded portion of the interview in which Graham said she and Johnson argued eight days after their wedding about whether they should have waited longer to get married. She said Johnson suggested driving to Glacier, where they continued to talk at the edge of a cliff.

Graham, 22, said Johnson, 25, was talking to her like she was a child and grabbed her arm. She said she knocked his arm off and pushed him in one motion, causing him to fall.

"I think I didn’t realize that one push would mean for sure you were over," Graham said, according to the transcript. "I felt like I shouldn’t have gotten married at that time, but not, there were not any issues of being with Cody, no. I feel like he’s the person I was going to spend the rest of my life with."

It’s implausible that the pair would halt an intense argument so that Graham could blindfold Johnson, Donahoe wrote in court filings late Friday.

The defense team wants to know if the "blindfold theory" was presented to the grand jury and why it wasn't mentioned in the original charging documents, MTN News reported.

Donahoe’s court filings are the first extended look at the defense planned by Graham. She initially said Johnson had disappeared July 7 after driving off with friends, but then she led park rangers to his body three days later so the search would be called off "and the cops will be out of it," according to prosecutors’ court filings.

A trial is set for Dec. 9. Federal prosecutors have asked for a delay.

Donahoe also claimed that investigators twisted Graham's statements to make it appear as though she deliberately pushed Johnson.

FBI investigator Stacey Smiedala also sent a Kalispell police detective from the room so he could "shape" Graham’s initial 90-minute interrogation on July 16 without having to record it, as is required in all Montana investigations, Donahoe said.

As a result, Graham’s statements that Johnson's death was an accident, followed by her fear and panic that nobody would believe her, were manipulated and then distorted into an exaggerated version of what happened, according to Donahoe.

Federal prosecutors do not respond to media queries about active cases, and they have not filed a response to Donahoe’s claims.

Donahoe is asking a federal judge to dismiss the murder indictment against Graham, to block prosecutors from using her July 16 statement and to prevent prosecutors from introducing the "blindfold theory."

Graham was called in to the Kalispell Police Department days after she pointed out the location of Johnson’s body, and she was initially placed in a room with Kalispell Detective Melissa Smith and Smiedala.

Smith then left the room, allowing Smiedala to interrogate Graham for an hour and 25 minutes without a witness and without recording the session, as required in state investigations, Donahoe wrote. That was an act of bad faith that should result in the statement being suppressed from trial, Donahoe wrote.

Smiedala, a skilled interrogator, "artfully used all the manslaughter buzzwords" to get Graham to admit that she acted not instinctively, but with the "heat of passion" required to prove a manslaughter charge, Donahoe wrote.

"Without the lengthy unrecorded session of Jordan’s interrogation, it is impossible to tell exactly what pressures were brought to bear on Jordan during that session," Donahoe wrote.

Smith then re-entered the room and they recorded a shorter interrogation of Graham, Donahoe wrote.

The criminal complaint charging Graham with murder included an FBI statement that excerpted from the interrogation, but that statement exaggerated and distorted several parts, Donahoe wrote.

Central among them is the assertion that Graham knocked Johnson’s arm off her hand, then pushed him in the back in two separate actions. It was just one defensive action to free herself from his grasp, Donahoe wrote.

The Associated Press contributed to this report.

Click here for more from MTN News.