Annie Dookhan And The Massachusetts Drug Lab Crisis

Graphic: Drug Findings Of Annie Dookhan


We have records of 58,070 drug tests Annie Dookhan performed as a primary or secondary chemist during nearly a decade at the Hinton State Laboratory in Jamaica Plain, Mass. This graphic is a breakdown of her official drug findings, grouped by drug class.

Cocaine was by far the most common finding, accounting for about a third of Dookhan’s drug tests, followed by marijuana, heroin and oxycodone.

In the Commonwealth of Massachusetts, drugs are broken down into five classes from Class A drug offenses, which are the most serious, to Class E drug offenses. They include:

  • Class A Drugs – Heroin and other opiates; drugs such as Special K
  • Class B Drugs – Cocaine; prescription opiates such as Oxycontin; Ecstasy; Amphetamines; Methamphetamine; PCP or Angel Dust
  • Class C Drugs – Prescription tranquilizers and drugs such as Clonazempam, Vicodin and Valium
  • Class D Drugs – Marijuana
  • Class E Drugs – Prescription drugs not otherwise classified


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Latest News

January 8, 2015

Thousands Of Drug Convictions At Stake In Massachusetts High Court Case

The case before the Massachusetts Supreme Judicial Court involves Annie Dookhan, a drug lab chemist who was sentenced in 2013 to at least three years in prison after admitting she faked test results.

October 23, 2014

SJC To Hear Petition To Dismiss Convictions Tied To Dookhan

The ACLU is asking the state’s highest court to dismiss tens of thousands of criminal convictions tied to former state chemist Annie Dookhan, who admitted to tampering with evidence.

March 5, 2014

SJC Sets ‘Presumption’ Of Misconduct In Dookhan-Related Guilty Pleas

The Supreme Judicial Court ruled Wednesday that defendants seeking to withdraw guilty pleas because their cases were handled by disgraced former state chemist Annie Dookhan must indicate they would have insisted on a trial if they knew about her malfeasance.