"He felt it was the direct result of someone in Washington looking at his Web site."

In one of his e-mail blasts expressing his white supremacist views, the man police sources say shot and killed a security guard yesterday at the U.S. Holocaust Memorial Museum told readers that they shouldn't expect to hear from him again. Von Brunn was shot and critically wounded by museum guards.

He was about to give away his computer, his primary connection to the fringe world of radical racists. He was living hand to mouth.

The e-mails were getting violent in tone: "It's time to kill all the Jews."

Von Brunn, who lives in Annapolis, was known for decades to fellow white supremacists who read his elaborate conspiracy theories on his Web site and met him through a network of radical racist groups.

The Southern Poverty Law Center, which monitors hate groups, has kept an eye on him since 1981. Lately, it has focused on his Web site, www.holywesternempire.org.