Tuesday September 30 5:41 PM EDT Diana Driver Was Alcoholic -- New Tests By Thierry Leveque PARIS (Reuter) - New laboratory analyses have found that Henri Paul, the Ritz Hotel security guard who drove the limousine in which Princess Diana died, was an alcoholic, sources close to the investigation said on Tuesday. The new tests on Paul's blood, taken from his body before his burial 10 days ago in his western France home town of Lorient, show he suffered from "moderate alcoholism" for an undetermined period of time, the sources said. Some mystery has surrounded the role of the driver in the August 31 crash fatal to Diana and her companion Dodi Al Fayed as well as Paul himself. Friends and associates have described the balding and bespectacled Paul, who lived alone in a Paris flat, as a conscientious and steady worker. Others, however, have said the Ritz's 41-year-old deputy security chief was a heavy drinker in the high-stress job of trying to ensure the security and comfort of the posh Paris hotel's prominent guests. A series of earlier tests had detected three times the legal level of alcohol in the chauffeur's blood and eyeball fluid along with traces of prescription drugs Prozac and Tiapride, both of whose instructions for use advise caution in driving. The new tests found that Paul had been a "moderate alcoholic," drinking steadily for an indefinite period of time prior to the crash, the sources said. Separate tests on strands of Paul's hair showed he had been taking the anti-depressant Prozac for about four months and Tiapride, a drug used to treat agitation and aggressive behaviour, since July. Doctors say the drug combination is commonly used in France to treat alcoholism. Investigators say they are leaning towards blaming the crash on excessive speed and alcohol though they have not ruled out the possibility that a mysterious second car may have played a role in the accident. Investigating magistrate Herve Stephan, leading the criminal inquiry into the cause of the crash, ordered the wrecked Mercedes limousine hauled to the accident site on Monday night to study how the crash took place. Stephan, accompanied by a dozen officials and investigators, spent nearly five hours in the tunnel under the Place de l'Alma surveying how the twisted hulk of metal fit in with the evidence he has gathered so far in his probe. Stephan left the tunnel under the Place de l'Alma in central Paris shortly after one a.m. (2300 gmt) without making any comment to reporters, who were kept well away. Dozens of police also kept passersby from approaching the site but experts could be seen measuring angles on the roadway, minutely inspecting the tunnel and taking numerous photographs. The session was one of several re-enactments of various aspects of the August 31 tragedy in central Paris that investigators are expected to carry out in coming weeks or months. Justice officials said they saw Stephan's move, a month after the accident, to be a sign to the British that the French were moving ahead in the investigation. Absent from the crash site on Monday night were the nine photographers and one photo agency motorcyclist who have been formally targeted in the investigation on suspicion of manslaughter and failure to help accident victims. Their lawyers have predicted the 10 will eventually be dropped as investigation targets, saying they had been made "scapegoats" due to public anger over the role of the media in hounding Diana.