Causes and Effects of Juvenile Crime One of the biggest problems that the United States is faced with in the present day is juvenile crime. Juvenile crime does not only affect the individuals who commit the crime, it also affects the victim of the crime. Experts still have not found the main reason why juveniles commit crimes. Also, drug use among the juveniles themselves leads to higher crime. Many doctors and other experts say that focusing on early intervention and prevention as the key to reducing juvenile crime.