Harris County Judge Robert Schaffer said in his mid-trial ruling, however, that he would instruct jurors that a key shown to them was not the one used by Zachary Stevens to drive the 2007 Saturn Sky involved in the crash, according to GM.

GM moved to dismiss the case on Monday, saying the key displayed in the courtroom did not belong to that vehicle and accused Stevens and his parents of trying to buttress their case by displaying a key chain carrying more weight than the one actually used in the crash.

The carmaker, which recalled 2.6 million vehicles in 2014 for defective ignition switches, has warned that added weight to key chains can cause the switches to rotate out of position and cut power to brakes, steering and air bags.

See also: How General Motors Expects Self-Driving Cars to Become a Reality

Stevens previously said that he had just a few items on his key chain at the time of the crash, while the key chain shown to jurors had additional items attached to it, including a gym membership card and souvenir Eiffel Tower.

Plaintiffs’ lawyers acknowledged in a court filing on Monday evening the key displayed in court was not the one from the crash but said GM was attempting to turn a “justifiable misunderstanding” about the key “into a criminal conspiracy.”

See also: How Much Did GM Really Want To Buy Lyft?

According to Stevens, switch rotation caused him to lose control of the car, hitting another vehicle and killing the driver.

GM maintains Stevens’ driving caused the accident. In a statement, the company said: “It will be up to the jury to make sense of the plaintiffs’ confusing, contradictory and misleading story about the key.”

For more on GM, watch Fortune’s video:

Josh Davis, a lawyer for Stevens, said GM‘s claims that his client intended to mislead jurors were “ridiculous.”

“This is not the stuff of John Grisham, but a simple mistake,” he said.

Stevens filed the lawsuit last year and it is the first to go to trial among roughly 20 pending in Texas state court.