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The depressants include alcohol, barbiturates and solvents. Stimulants work by increasing the transmission of nerve impulses in the brain; they include cocaine, MDMA (better known as ‘ecstasy'), and amphetamines. The next group of drugs, opiates have been known since the time of the ancient Sumerians; in 4000BC they named the plant that produced resin from its unripe seedpods, the poppy. From this resin come the opiate drugs. These depress neural functioning, suppress physical sensation and responses to stimulation, which is why the codeine and morphine versions of this drug are used as substantial painkillers. Hallucinogens are the final group and contain LSD, PCP and cannabis.
In this dissertation, once we have considered what leads initially to drug use and misuse, we will look at the link between drugs and crime. I have defined above what I mean by drugs, I'd now like to define what I mean by crime. Such a definition is not easy to establish. There is a perceivable difference between the definition made by a research psychologist and a lawyer; one has a highly conceptualised definition, the other a legal one. In this dissertation, I will use Glen Walters definition of crime. In his book Drugs and Crime in Lifestyle Perspective, he defines it as ‘a rule breaking behaviour that, if known to legal authorities, would result in the rule breaker's being charged with a criminal offence punishable by law'.
Size of drug problem
It is not an easy task to accurately record how many people take these forms of drugs on a regular basis. A National Survey on Drug Use and Health, undertaken in the United States in 2003, revealed that an estimated 3.7 million people had used heroin at some point in their life. It also revealed that 119,000 had used heroin in the month before the survey. It is perhaps encouraging that the British Crime Survey reveals that drug taking in this country amongst 16 to 24 years olds has decreased since 1998, although it has increased in people form 16 to 59. A United Nations report, published in 2005, estimated that 200 million people, or approximately 5% of the world's population, aged 15-64, have used drugs in the last year. Whichever figure is correct, the number of people who abuse drugs is large.
In terms of the criminal side of crime, this is an increasingly difficult problem to deal with. The illegal market for drugs is immense, which attracts the attention of large organised crime groups. It is likely that dealing with this problem will be a major part of the work done by the new Serious and Organised Crime Agency. A major area that will need to be looked at is how to disrupt the flow of drugs in to the country; this will be a complex undertaking. Using Cocaine as an example, the drug originates in Latin America, principally Columbia.