Central database of all gun sales? DOA. Not ever going to happen in my lifetime. Why in the hell should the gov't know what guns you own when the 2nd amendment was specifically designed so that citizens could raise arms against a gov't that becomes to tyrannical? Also what would such a lifecycle determine? I mean you can follow a paper trail, just not conveniently. Gun is used in a crime and the serial number matched, it can be traced at minimum to the original buyer via serial number inquiry to gun dealer, to original buyer. Admittingly, this is where things get tougher and for good reason. You want to ban private sales? That will likely happen in our lifetime, but that still wouldn't account for "stolen" or "lost" firearms that find their way into crimes. Again, stolen guns and straw purchases account for the vast majority of felons obtaining guns. Straw purchases being the largest. There is already the means to track straw purchases, and stolen guns aren't going to go away.
I also question your logic here about Indiana being a source. We already know that straw purchases account for the overwhelming amount of gun crime. So these would be purchases that go through the normal process. Meaning they would be included in this data.
You really should read the hard data and not cherry picked data before you come up with your assertions. See below.
https://www.atf.gov/...ebsite15pdf/download Some items of note:
1. Sporter class guns (which you probably call an assault weapon) only 28 of 12,390 firearms recovered (note this is recovered,not necessarily used in a crime). Page 6 describe source.
2. 9MM and .22 accounted for the majority of gun crimes.
3. What? Only 191 guns were recovered in 2015 from a homicide. 3,489 were under investigation, meaning they were suspected of being tied to a crime, but not proven.
4. 4,231 guns were recovered with a source from Illinois. 1,158 was Indiana. Again, these are guns recovered, not necessarily used in a crime.
5. Time to crime is overwhelmingly over 3 years. With an average is nearly 12 years. That means these were possessed more than a decade before recovery.
6. Average year of possessor is 34 years.
7. A significant number of guns are simply found.
8. And the biggest one Weapons trafficking only accounted for 32 recoveries weapons selling only 33. So much for the theory the illegal black market for guns are pervasive.
Other data that can be found here. Illinois is the second largest source of guns for Wisconsin and Missouri. Damn those slack Illinois gun laws.
"In the world I see you are stalking elk through the damp canyon forests around the ruins of Rockefeller Center. You'll wear leather clothes that will last you the rest of your life. You'll climb the wrist-thick kudzu vines that wrap the Sears Towers. And when you look down, you'll see tiny figures pounding corn, laying stripes of venison on the empty car pool lane of some abandoned superhighway." T Durden