CAMBRIDGE, England — An American who died in May when his car hit a tree had traces of cannabis and high levels of alcohol in his blood, an inquest heard Thursday.

Lincoln Warren, 26, the husband of an airman stationed at RAF Lakenheath, England, was killed early on May 23 when his car skidded off the A14 highway and hit a tree near Stow-cum-Quy, a town near Cambridge.

“Mr. Warren was the author of his own misfortune and the verdict I shall record is one of accidental death,” said Coroner David Morris, according to a report Friday in the Bury Free Press, a weekly newspaper.

The name of Warren’s spouse has not been released because of privacy concerns.

The accident closed a lane of the highway for six hours. Pieces of the car were scattered about the area, with the engine and hood of the Peugeot landing 30 feet from the wreck. Warren was pronounced dead at the scene.

The investigation found nothing wrong with the car that could have caused Warren to lose control.

According to testimony at the inquest, Warren, 26, had been clubbing in Cambridge with friends prior to the accident and started home to RAF Lakenheath, about 30 miles away, at 2:50 a.m.

A blood test revealed Warren’s blood alcohol level far exceeded the legal limit for driving.

The newspaper quoted Morris as saying, “Yet again, I’m afraid alcohol has played a significant part and, perhaps to a lesser extent, drugs, too, in this case.”

Cannabis is the active agent in marijuana.

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