Police started tracking man 5 months ago after Internet messages about Columbine . Police traced his attempts to acquire explosive materials via the Internet . Police arrested Wednesday as he received the materials at his home , police say . His blog included sections showing that he knew how to make bombs , displaying the same musical tastes as the Columbine killers , describing his interest in weapons and mentioning `` social isolation that led to situations of feeling left on the sidelines at school , '' the statement said . In his personal diary , ` ` he showed a hatred for women , '' police say .
Police started tracking man 5 months ago after Internet messages about Columbine . Police traced his attempts to acquire explosive materials via the Internet . Police arrested Wednesday as he received the materials at his home , police say . In his personal diary , ` ` he showed a hatred for women , '' police say .