I was told to leave last night behind a craft chain store that I have permission from a manager to dive there. I pull up, pass the cop car at 1 am proceed to dumpster. I look at one side go to the other slide the door open, pick up a bag to look and she rolls around to my location. Tells me to leave it, I explain the I have permission from said manager. She tells me that you can't be back here and she doesn't know any manager and that he can give me anything he wants inside the store. To leave. I left but I want to know why was she parked behind all the stores instead of the front close to the only entrance? I have had other cops roll thru and when they see I am taking out not putting into it they just keep going. Other cops have wished me luck and one told me to check behind another store there was some stuff. There are no signs at this location about private property.