Tests demonstrate that monkeys with low serotonin levels consume alcohol at excessive rates, it added. That trait could also be caused by brain chemistry. Urbana Police Chief Eddie Adair said alcohol also increases someone's chance of being a crime victim. In Urbana, the victims of batteries or robberies are often on their way home from parties. More than half of the victims had been drinking at the time of their assaults.
Drugs also have an effect on crime.
Spear said crack cocaine increased crime in Champaign in the early 1990s. People who became addicted to the drug would commit crimes to feed their addictions, Spear said. Champaign police made changes in the department to stop drug-related crime, he said. We became community-oriented. The police also created a task force to focus on stopping drug use and drug-related crimes in Champaign, Spear said.