The police can come to your house to investigate the offense. The statute of limitations for a summary offense (first offense, less than $150.00) is 30 days after the incident, or 30 days after the discovery of the identity of the perpetrator. For a misdemeanor or felony, the statute of limitations is 2 years.
If you are contacted by police, do not speak to them, even to acknowledge visiting the store, until you have consulted a lawyer. Many people think that this will make them look guilty, but it is likely in such a circumstance that the case cannot be proven unless you supply some of the evidence.
However, it is unlikely that you will hear anything more about it. Please use this as a learning experience. If you do it again, you may not be so lucky. I have spoken to people who cannot get a job because of a retail theft conviction. This consequence is far worse than the official punishment.
I have written on what to do when stopped by department store police on my blog, Pittsburgh Legal Back Talk.