I reported my identity theft to the local police, who also had me file reports online with FTC and IC3. Because so much information has been stolen about me everything has to be frozen, secured, and constantly monitored. Both I and the thieves live in Texas, but in different cities. I didn't know who they were until a couple years later when I started getting emails from the Victim Notification System of the US Department of Justice telling me the progress of three people going through the court system. They went to prison for 2-5 years.
https://www.mytexasdaily.com/north-texas/garland-man-sentenced-to-prison-for-stealing-over-individuals-identifications/article_34835de8-b211-11e7-9fff-8f5602a51449.html
Because this case involved a lot of data and victims I think it got more attention than one that might be someone going through data files and ripping off individuals or small groups. Even after these people were imprisoned and I put a fraud alert on my credit report, I've had a rental car stolen under my name, credit cards and bank accounts opened, and purchases of all kinds of things that end up at my house that I have to take time to return. It has been an unending PITA.
Definitely freeze your credit and put 2FA on everything important if you don't already. It may eventually get worse for you like it did for me if you don't act to secure and monitor your information. I keep records of everything that seems illegal/unusual and force outsiders to communicate with me in writing. In Texas I can record phone calls, and I do if something doesn't seem right. But mostly I ignore unknown calls and keep the voicemail. I've had threatening letters from creditors, but they back off quickly when presented with the data.