Published: Aug 05, 2011 6:25 PM EDT
Updated: Aug 05, 2011 7:35 PM EDT

SAN JOSE, Calif. (AP) - A federal grand jury has indicted a Las Vegas man on charges he sent more than 27 million spam messages to Facebook users.
    
Forty-year-old Sanford Wallace, the self-proclaimed "Spam King," turned himself in Thursday to face charges outlined in last month's indictment filed in San Jose, Calif.
    
Prosecutors say Wallace compromised about 500,000 Facebook accounts between November 2008 and March 2009 by sending massive amounts of spam through the company's servers.
    
In March 2009, a judge banned Wallace from using the social networking site, but the indictment alleges that he violated that order within a month.
    
Wallace is charged with six counts of electronic mail fraud, three counts of intentional damage to a protected computer and two counts of criminal contempt. He posted $100,000 bond after a court appearance Thursday.

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