Read this:
Filing a False Police Report: Penalties and Consequences
If you lied to the police and fingered Willie Wicked for committing a crime, you have more to worry about than filing a false police report. 
You can be sued in civil court for destroying a person's life and taking his/her freedom. 
No doubt you testified under oath in open court that Willie Wicked committed X,Y, & Z against you. That would be another charge, perjury. 
Filing a false police report in Indiana is called, FALSE INFORMING.
It could be a misdemeanor, or felony. 
An innocent person sits in prison on a felony conviction, you'd be charged with the felony version, plus felony for perjury. 
The SOL for a felony in Indiana, none. 
False informing: (IND. CODE ANN. § 35-44-2-2)
Indiana	Ind. Code Ann. 35-41-4-2	
Class A felony: no statute of limitations; 
Class B, Class C, or Class D felony:  within 5 years after the offense	within 2 years after the offense
I suggest you speak with an Indiana criminal defense attorney BEFORE you contact the district attorney/prosecutor.
You have a great deal of civil and criminal exposure. 
Good luck.