One of the articles said that an employee helped him put the bottles that he wanted in a cart. Another said that while this was going on, another employee was around the corner of the aisle on a bluetooth talking to police. I read somewhere in one of those articles that the employees padded the story to expedite police arrival.
The “manager is a green beret and is allowed to carry” may be a misinterpretation of Eric Scott identifying himself as a former military officer with a CCW. I haven't heard any witnesses corroborate the “being told to leave” part. I have heard many police say that when they are called to a store where a person “has been asked to leave”, they always take the management to the person so that they can witness the demand that the person leave. They say it is common for the person being asked to leave to say that no one asked them before, because management is often trying to get the police to to their job, as management does not want to confront the person themselves.
If the employee did that then they are partially responsible for his death and they and Costco should be civily sued by his family.