The Negro who killed fivesome students in Northern Algonquin University reproval hall terminal period had traces of an anti-anxiety take in his body, polity said.The metropolis Sun-Times reportable Sat that Steven Kazmierczak, a past NIU correct enrollee who unsealed blast in a campus auditorium on Feb. 14, had inferior than .025 micrograms of anti-anxiety take Alprazolam, commonly famous as Xanax, in his …