Answer:
Yes.
The proprietor and the friend were accessories to the crime. They could have prevented it, but they did nothing. The friend even participated actively in the robbery.
Explanation:
In criminal law, an accessory to a crime refers to a person who knowingly and voluntarily participates in the commission of a crime, for example, breaking rental storage. They can be categorized as before the crime (the proprietor who sold the crossbar) or after the commission of the crime (the friend that facilitated the robbery). Accessories to a crime need not be actually present at the scene of the robbery to be held liable for this crime.