VUPDblue
Silencers Have NEVER Been Illegal !
1. You're in Lake County, so you may as well be part of Chicago, and I'm not really surprised with regard to your attitude.
2. You'll hear about later when you get sued under IC 34-13-342 and/or U.S.C. §1983 for false arrest, especially since (provided the person was not operating a motor vehicle) they are NOT required by law to have either Driver's License or LTCH in their possession. Additionally, the citizen would have gone above and beyond their legal requirements by showing you and image of their DL AND LTCH. Pretty sure you'd lose that battle, and possibly your job if you took that approach.
Sorry but no, they wouldn't have. The state does not, by statute (or lack thereof specifically), recognize electronic copies of any of the above mentioned documents.