The guitarist with Hawthorne Heights, Casey Calvert, died in his sleep on Friday.
The band have issued at a statement:
Calvert was 26 years old. He had lived through some volatile times as a member of Hawthorne Heights, including fighting a battle to be freed from the terms of contract with Victory Records which the band maintained was unfair, and becoming embroiled in a seedy attempt to nobble NeYo's sales by encouraging fans to make it difficult to find his album. The band claimed this was down to the label and they knew nothing about it.
With or without dirty tricks, Hawthorne Heights built an impressive fan base; their second album, If Only You Were Lonely, made it to number three in the Billboard album charts early last year.
[Update: 26/11/07 - Billboard are reporting the cause of death was probably asthma]