The guitarist was found dead on band's tour bus outside of a Washington DC club on November 24th. The MTV report also said that "the autopsy listed Calvert's death as accidental, though it added that it was brought on due to 'substance abuse.' Both citalopram (also known by the brand name Celexa) and clonazepam (also known by the brand names Klonopin and Rivotril) are prescription drugs."

At the time of his death his band mates said in a statement, "At this time we're not sure what exactly happened. Just last night he was joking around with everyone before he went to bed. We can say with absolute certainty that he was not doing anything illegal. Please, out of respect to Casey and his family, don't contribute or succumb to any gossip you may hear. We don't want his memory to be tainted in the least. Casey was our best friend. He was quirky and awesome and there will truly be no others like him!"