An inside source revealed this weekend that US federal antitrust officials were looking into possible anticompetitive practices from Nortel's patent selloff. The Department of Justice, Federal Trade Commission, or both are being asked to see if the "Rockstar" coalition formed by Apple, Microsoft, RIM, and others may have been unfairly trying to stifle Android. The Washington Post's associate didn't know who had prompted the investigation, although the American Antitrust Institute had called on one this week.