Hi john-mc-,
Your questions: would they be able to locate the person? Well, assuming the bank account belonged to that person, they can get a name and address. But there's no guarantee the account belongs to that person, or that they are living at that address.
The CCTV from other cameras around the shop might show the person getting into a car, or talking to other people. The CCTV of the person in the shop may help confirm the person's identity for evidence.
And then the stolen goods might lead the police to the thief, if the goods are identifiable. But there are no guarantees the police will catch the person if they do actually try.
Are there obligations to act?
Yes. The NSW police code of conduct requires police to "uphold the values of the NSW police". Those values are set out in the police act 1990. " uphold the rule of law" is one of them.
So, I'm guessing you have reported a crime, and the cops have done nothing. The police have an obligation to keep the victim informed of their progress. If they have failed to do a satisfactory job then you can make a complaint.
I hope this helps