(NewsNation) — A DUI charge against the driver accused in a deadly eight-car pileup in California has been dropped after toxicology tests were negative for drugs or alcohol.

Authorities said a semitrailer driven by Jashanpreet Singh, 21, crashed into several vehicles traveling in bumper-to-bumper traffic on Interstate 10 in Ontario on Oct. 21. The crash left three people dead. Singh was arrested on suspicion of driving under the influence of drugs and vehicular manslaughter while intoxicated.

In a statement Oct. 31, the San Bernardino County District Attorney's Office said "toxicology reports confirmed none of the substances tested were present in the defendant's blood at the time the test was rendered" and that an amended complaint was filed to "reflect the findings."

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