If you can determine who property belongs to, it is not abandoned until the owner manifests a clear intent not to retrieve it. That’s the law of personal property.

Also at play here is the law of bailments. One who charges a fee to hold the property of another had created a contact for bailment. If the owner doesn’t retrieve it after a fixed term, an involuntary bailment is created, and the bailor must safeguard and hold the property for a reasonable time, after which it may be considered abandoned (if the owner manifests an intent not to retrieve it).

I have not read the complaint but I will be on the lookout.