It's been nearly four months since a six-car accident on the Jersey Turnpike left one man dead and comedian Tracy Morgan in critical condition, and now the courtroom battle over who is at fault is heating up.

Attorneys representing Morgan and three others injured in the crash questioned whether Walmart should have known that their driver Kevin Roper was "fatigued" when he caused the pile-up.

On Monday, the company responded, according to The Hollywood Reporter, with nine affirmative defenses, including that Morgan's injuries "were caused, in whole or in part, by plaintiffs' failure to properly wear an appropriate available seatbelt restraint device."

Essentially, among several of Walmart's defenses that they are not at fault was the claim that Morgan and the others in the party bus wouldn't have been hurt, as badly or at all, if they had been wearing seatbelts.

It's still early in the suit, so many of the details about the crash are still under wraps, but that is likely to change as the proceedings move forward.