Monday September 29 3:14 PM EDT Diana Probers Blame Speed, Drink, for Crash By Thierry Leveque PARIS (Reuter) - A month into their probe of Princess Diana's fatal car crash, French investigators say it appears that excessive speed and alcohol were to blame rather than pursuing paparazzi. But they have not yet ruled out the possibility that a mysterious second car played a role in the Aug. 31 crash by causing the Mercedes-Benz limousine in which Diana was riding to swerve out of control and crash into a concrete pillar. "In this crash, we find a combination of the two principal causes of accidents in France: alcohol and speed," said one source close to the investigation, who spoke on condition of anonymity. "Certainly, there are some avenues of investigation which are still being explored. But at this stage there is nothing unusual about this accident," said the source. Chauffeur Henri Paul, who died in the Aug. 31 Paris crash along with Diana and her companion Dodi Al Fayed, was driving "at a very high speed" and had a criminal level of alcohol in his blood, investigators have found. These findings made it unlikely that the nine photographers and one photo agency motorcyclist formally targeted in the investigation would be brought to trial on charges of manslaughter, in the opinion of their lawyers. "The photographers were scapegoats who were made investigation targets in an atmosphere of hysteria," said Jean-Marc Coblence, who represents three of the 10. "The time has come for a counterattack." While it was too early to ask investigating magistrate Herve Stephan to end proceedings against the 10, a French court could soon be asked to demand the return of two press cards seized on the night of the accident, preventing two of the accused from working at their profession, he said. "I am rather optimistic. A conviction on manslaughter grounds must have a sound basis," Coblence told Reuters. As for a second accusation, the alleged failure of the 10 to come to the assistance of an accident victim, Coblence said, "This is a false problem." "The charge would hold if it were proven that the accused were on the site for 10 minutes and no one called emergency services. But it has been established that people were informed within a minute after the accident," he said. The next step in the probe is for magistrates Stephan and Marie-Christine Devidal to stage an official re-enactment of the crash. Such re-enactments are typically used by French justice authorities to help work out unsolved aspects of a crime and resolve conflicting testimony. Re-enactments are typically dull affairs but this one is likely to draw hundreds of journalists and perhaps thousands of curiosity-seekers to the Place de l'Alma for two nights running. Before the re-enactment can be staged, the magistrates want a laboratory in suburban Paris to complete its analysis of some paint chips and glass fragments found at the scene of the accident as well as streaks of paint found on the Mercedes' right-front fender and rear-view mirror. Investigators say the paint chips, glass fragments and streaks are likely to have no bearing on the cause of the accident. But they say they cannot yet rule out the possibility they came from a car which was side-swiped by the Mercedes as the speeding limousine came around a curve just before entering the tunnel under the Place de l'Alma where the crash took place. They say the mystery car -- possibly a Fiat Uno, judging from the shards of glass -- might have been driving far slower than the Mercedes or may have swerved in front of it, causing driver Paul to lose control.