Philippine authorities have arrested a man suspected of murdering 9 people this month—all thanks to his Facebook account. Mark Dizon, whose alleged victims include a Canadian, an American, a Brit and their Filipina partners, "was fond of computers and this gave him away," said the police superintendent. A suspect seen fleeing the most recent murder was identified by a family friend of the victims, whose daughter is a Facebook friend of Dizon, reports the BBC. (More Facebook stories.)