01/06 SCHAUMBURG, Ill. (UPI) -- An undercover detective killed in a traffic accident while on a drug investigation was legally drunk, a toxicology report says. Detective Roy Reininger, 37, had a blood alcohol level of .207 percent when he died, the Cook County Medical Examiner's Office said Tuesday. The legal limit for intoxication in Illinois is .10. "He's twice the level of what is considered to be under the influence of alcohol," a spokesman for the office said. An estimated 900 police officers attended Reininger's funeral Monday in a traditional show of respect. Reininger was assigned to a federal Drug Enforcement Administrtion team investigating drug traffic in Chicago suburbs. He was driving a village-owned Chevy Blazer on Schaumburg Road early Thursday when it slammed into the back of a village salt truck. Reininger was pronounced dead within an hour at Humana Hospital in Hoffman Estates. As an undercover officer, Reininger was allowed to drink on duty if given permission and in special circumstances, Schaumburg Police Chief Ken Alley said. For example, he could drink while meeting with an informant in a bar to avoid raising suspicion. However, Reininger did not have such permission on Thursday morning, Alley said. And even if such permission were granted, state law still forbids driving while drunk, authorities said. "It's always understood it's got to be reasonable. You have to utilize judgment," Alley said. 01/06 SCHAUMBURG, Ill. (UPI) -- An undercover detective killed in a traffic accident while on a drug investigation was legally drunk, a toxicology report says. Detective Roy Reininger, 37, had a blood alcohol level of .207 percent when he died, the Cook County Medical Examiner's Office said Tuesday. The legal limit for intoxication in Illinois is .10. "He's twice the level of what is considered to be under the influence of alcohol," a spokesman for the office said. An estimated 900 police officers attended Reininger's funeral Monday in a traditional show of respect. Reininger was assigned to a federal Drug Enforcement Administrtion team investigating drug traffic in Chicago suburbs. He was driving a village-owned Chevy Blazer on Schaumburg Road early Thursday when it slammed into the back of a village salt truck. Reininger was pronounced dead within an hour at Humana Hospital in Hoffman Estates. As an undercover officer, Reininger was allowed to drink on duty if given permission and in special circumstances, Schaumburg Police Chief Ken Alley said. For example, he could drink while meeting with an informant in a bar to avoid raising suspicion. However, Reininger did not have such permission on Thursday morning, Alley said. And even if such permission were granted, state law still forbids driving while drunk, authorities said. "It's always understood it's got to be reasonable. You have to utilize judgment," Alley said.