Once you file the police report, your part of the criminal matter is finished - unless you are asked to either appear in court to testify, are asked to appear to give a deposition or other type of additional statement, or otherwise contacted by police, prosecutors, or the court who will tell you what it is they need from you.
In addition to the very good advice already given, you might visit
http://fraudaid.org/ - an excellent site with tons of helpful information for addressing issues like yours, and for preventing future problems.