So...Arthur left stolen property in Barbara's vehicle. Was Arthur the person who stole the property? If not, did Arthur know it was stolen? Did Arthur intentionally leave the property in Barbara's car or was it done inadvertently? What sort of property are we talking about?
Why?
How did the owner of the property (whom we'll call Charlie) come to learn that the property that had been stolen from Charlie was in Barbara's possession?
person who borrowed property(camera) and owner of camera informed driver
As well as what?
In any event, yes, subject to how you answer the questions I asked, Barbara's refusal to return Charlie's property could result in criminal charges being filed against her.