Facebook spammer Wallace allegedly sent over 27 million messages on the social network. (TAN SHUNG SIN/REUTERS)

Wallace has allegedly accessed over 500,000 Facebook accounts and sent more than 27 million spam messages on the network.

In a statement, Facebook responded to the indictment. Chris Sonderby, Facebook Lead Security and Investigations Counsel, said, “We will continue to pursue and support both civil and criminal consequences for spammers or others who attempt to harm Facebook or the people who use our service.”

The social network had previously sued Wallace for sending unwanted messages, and a judge ordered him to pay $711 million.

The Washington Post Co.’s chairman and chief executive, Donald E. Graham, is a member of Facebook’s board of directors.

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