After a resounding success last month in hauling in 49 alleged gang members using evidence posted to Facebook, the New York Police Department announces its plans to expand its online investigative department. According to the Associated Press, the department’s commissioner Raymond Kelly announced today that the NYPD will fortify its social media sleuthing and double the size of its gang unit up to 300 investigators. “By capitalizing on the irresistible urge of these suspects to brag about their murderous exploits on Facebook, detectives used social media to draw a virtual map of their criminal activity over the last three years,” Kelly said. Read the full story at CNET.