PORTLAND, Ore. (KOIN) — The 55.3 million fatal doses of heroin seized by law enforcement in Tigard last year turned out to be mostly water, according to an independent analysis.

As KOIN 6 News previously reported, federal agents announced the arrest of four Mexican drug traffickers after they were caught transporting eight 55-gallon drums of a liquid narcotic in Tigard in January 2024.

Originally, law enforcement believed the substance to be liquid fentanyl. Field tests later showed that seven of the eight drums contained heroin, according to court documents obtained by KOIN 6 News.

Investigators said they believed the containers held 1,430 liters, weighing 1.4 metric tons, of liquid heroin. The government characterized the drug seizure as "truly an astronomical amount," and heralded th

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