http://www.cnn.com/2007/US/12/10/shooter.youth/index.html
Looks like the problem was that he heard voices, and played some dark rock music in a concert at the mission. Sounds like some kind of mental illness.
oh good - I heard that interview with Richard Werner - glad there is a link now
considering what we discussed earlier...Excerpt:
That was five days after Murray performed a pair of dark rock songs at a concert at the mission that made fellow workers "pretty scared," according to Werner.The performance -- which included a song by rock band Linkin Park and another that had been recorded by controversial rocker Marilyn Manson -- followed months of strange behavior, Werner said.
Werner, of Balneario Camborius, Brazil, said he had a bunk near Murray's and that Murray would roll around in bed and make noises.
"He would say, 'Don't worry, I'm just talking to the voices,' " Werner said. "He'd say, 'Don't worry, Richard. You're a nice guy. The voices like you.' "