But 8.6% of those who had at least one biological parent who abused drugs had their own abuse problems versus 4.2% of adoptees whose biological parents did not have a history of drug abuse.

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In a study presented in May at the annual meeting of the American Psychiatric Association, Roland Griffiths, a researcher at Johns Hopkins University, said patients with a history of drug abuse were given doses of Rozerem that were 20 times stronger than an effective dose for sleep.

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Prison medical records from 2008 state that he had suicidal thoughts, had deliberately injured himself on a number of occasions, and had a history of drug and alcohol abuse.

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The inquest into the death of Mr Thompson, of Gorton, heard he had a long history of drink and drug abuse and had been addicted to crack cocaine and heroin.

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In most states, a person with a long history of arrests and convictions for misdemeanors (often pleaded down from felony charges), prior restraining orders for domestic violence and history of drug and alcohol abuse can own as many military-style weapons as he can afford to purchase, and can legally carry concealed guns almost anywhere.

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In a written request for Mr Walker Lindh's release, defence lawyers said their client had no previous criminal record, no record of drug or alcohol abuse and no history of violent or dangerous conduct.

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They contend (as Mr King's lawyers may argue during his defence) that the victim had a history of substance abuse, and the killing was a result of a drug deal gone bad.

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