Wait for the full report.
I am sure we will see this innocent guy didn't simply walk in the store, pick up three phones, take them to the cashier, attempt to pay cash and was out-of-the-blue refused service asked to leave, and the officer just jumped in roughly to forcefully remove this quiet innocent SOB (Son of Barrack) from the store.
We always fuss about media bias and lack of facts when reporting on all things political, and rightfully so. I suggest we also view media reports on situations like this with the same critical eye.
The article does not say that Davidson asked for account information on a third party. It just says that the store does not give that information out. We have to do a lot of assuming here. Truth is, the article does not give enough information for us to know what really happened.