German prosecutors have brought criminal charges against track and field athlete Sara Benfares, who has been banned for five years for doping, on suspicion of unauthorized self-doping. The public prosecutor’s office in Saarbrücken confirmed the news to dpa on Friday. The German distance runner was banned by the nation’s anti-doping agency NADA last month, with the body stating it went beyond the usual four-year sanction because of “aggravating circumstances.” It said that five forbidden substances were detected in three doping tests between last September and January, including the steroids te…