This may no longer be about your job. You may be implicated in a criminal conspiracy. I suggest you contact a criminal defense lawyer.
You may be contacted by the police. You could even be arrested. Walmart takes security seriously. They vigorously pursue wrongdoers.
If the police contact you, I suggest you politely refuse to speak about this mess. You may have lost your job. I doubt you wish to lose your freedom, or risk a felony conviction. Therefore, stop talking about this. Your job has been lost. There's almost no chance Walmart will rehire you. There's a very big chance you could be arrested for a felony.