The acquisition of drugs in prison is a complex issue that can involve multiple sources and methods. While it is difficult to identify a single primary source, based on various studies, reports and surveys, the following are common ways drugs are acquired in prison: 1. **Bribed or corrupt prison staff**: In some cases, corrupt prison staff may accept bribes or bribes to allow drugs into prisons. This may include guards, officers or other personnel with access to secure areas and prisoners. 2. **Visitors and visits**: Drugs can be brought into prisons through visits between visitors and prisoners. This can happen by: * Hiding items on the body * Using quien (a package made from an expandable material that is swallowed and then expelled upon arrival at the prison) * Exchanging small packages during visits * Using hidden compartments or secret caches 3. **Mail and packages**: Drugs can be brought into prisons through the mail or packages, often using covert methods such as: * Hiding in books, magazines or other items * Using unconventional mailing methods, such as mailing to false names or addresses * Exploiting weak screening procedures 4. **New inmates**: Upon admission to prison, new inmates may bring drugs into the facility. This may be intentional or accidental, such as when the individual is unaware that they have a substance in their system. 5. **Internal transport**: Once drugs are inside a prison, it is often transported internally between inmates, between different units or even between different prison facilities. 6. **Drones and drops**: Occasionally, drugs are dropped or brought into prisons using drones. 7. **Collusion**: Sometimes, inmates and outside colluders may work together to bring drugs into prisons. 8. **Breaking of security protocols**: Lack of effective security protocols, checks, or routine searches can make it easier for drugs to enter a prison. 9. **Environmental**: Drugs can also be present in the prison environment, such as residual materials left behind by a previous inmate or corrupt staff. It is important to note that the specific ways in which drugs enter a prison can vary by institution, location, and other factors. Institutions may implement a variety of strategies to prevent and combat the flow of drugs, such as increased security measures, enhanced visitor screening, and the provision of substance abuse treatment programs.