In the aftermath of the shooting at Northern Illinois University in February of this year, Americans struggled to understand how Steven Kazmierczak could have perpetrated such a terrible tragedy. National media outlets quoted close friends of Kazmierczak who described him as "probably the nicest, most caring person ever." His professors said he was "a nice kid" and "extremely respectful." NIU Police Chief Donald Grady said that law enforcement had "no indications at all... (GunPolicy.org)