Defacing a firearm in Illinois is serious business.

If you knowingly or intentionally changed, removed or obliterated the name of the importer’s or manufacturer’s serial number from any firearm, you can be charged with a Class 2 felony.

Simply possessing a firearm where the serial number has been changed or removed is a Class 3 felony. See 720 ILC 5/24-5. To convict you for possession, the State need only prove beyond a reasonable doubt that you knowingly possessed a firearm which was defaced. The state need not show that you knew the weapon was defaced.

The law exempts people who repair or replace parts on guns if they remove marks other than the serial number. The state has six years to bring charges against you for defacing or possessing a defaced gun.

If you have been charged with a crime, contact an experienced criminal law attorney immediately. An attorney can review your case for its best possible defense. Did the police have probable cause to search the premises where they found the defaced weapon? Can the state prove that you knowingly possessed the gun? Even if the police acted lawfully and the evidence against you is overwhelming, an attorney who is respected in the courthouse may be able to negotiate a more favorable plea agreement than you could on your own.

If you have questions about this or another related Illinois criminal or traffic matter, please contact Matt Keenan at 847-568-0160 or email

Source: People v Lee

(Besides Skokie, Matt Keenan also serves the communities of Arlington Heights, Chicago, Deerfield, Des Plaines, Evanston, Glenview, Morton Grove, Mount Prospect, Niles, Northbrook, Park Ridge, Rolling Meadows, Wilmette and Winnetka.)

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