Complex sentence: Kimveer Gill, the man behind the Dawson College shooting in September 2006, was a fan of the band and in his blog on VampireFreaks.com on the day of the attack, he had mentioned the song.
Split into simpler sentences: Kimveer Gill, the man behind the Dawson College shooting in September 2006, was a fan of the band. In his blog on VampireFreaks.com on the day of the attack, he had mentioned the song.