Can You Be Charged With Shoplifting If You're Not Caught Before Leaving the Store

Depends on who witnessed what. And what is on surveillance tape. You can have your lawyer ask for "discovery" - aka "evidence".

Lets say to the best of my knowledge person A was off camera and clear of LP when goods were concealed.

Let's say...until your attorney asks for "Discovery"...you don't know what is or is not on that tape....

Without knowing the details beyond Person A, B, or C...well, we are not psychic. You are best to get a lawyer. You would have lawyer/client privacy laws...and be able to ask for discovery.

A -B - C this all sounds like a school project.