You were caught with unpaid merchandise.

You are getting off very easy with the Civil Demand. This is separate from Criminal Charges.

If you don't pay it....the amount can double, triple...then they can sue you in Civil Court. As the police were called, even though Criminal Charges were not pursued, there will still be a record of police were called. Likely, the store personnel have record of the event, including video footage.

If you want to claim you license was stolen....have fun explaining why you never reported it as such....

Approaching the store manager is not a good idea. You just give further evidence of your guilt. And with your ADD...maybe you forgot when you were told you were no longer welcome in any WalMart store......