The Aurora murderer at the Henry Pratt Co. valve manufacturing plant in Illinois was a prohibited possessor of firearms. He had been convicted of aggravated assault in Mississippi in 1995, for stabbing a woman. He was about 22 years old at the time. Characters are pretty well formed by the time you are 22. The murderer had been arrested six times in Aurora for traffic and domestic battery incidents, the last in 2008. He was arrested in 2017, in Oswego, Illinois, for disorderly conduct and property damage. No convictions were listed during this period. He originally passed a background...