My message on the Boulder shooting tragedy

I read from Isaiah 8 and my message on the Boulder shooting tragedy. I've been somewhat connected to two of these horrific events, I was a musician and n staff at a very large church not far from Columbine H.S. and some of the youth group kids went to Columbine, and Aurora Century 16 was the theater I took my own kids to when they were young, I had a former Band student in that theater the very night the deranged killer shot up the place. She was not harmed at least physically. Why are these things happening some might ask...and why would God allow such evil?