In this randomized controlled trial, investigators from the Behavior Problems Prevention Study Group examined whether an intervention for at-risk 6-year-olds could affect their outcomes in young adulthood. Researchers screened nearly 9,600 children in kindergarten and identified 979 children with behavioral problems. These students came from 55 schools in four communities. The children were randomly assigned to a control group and a 10-year intervention group. The intervention was a combination of multiple forms, including parental behavior training, child social skills training, child counseling, peer support, and other psychosocial interventions. Eight years after the end of the intervention, the researchers looked to see if there were differences between the groups. The results found that those who received active treatment were less likely to have a psychiatric disorder; children who received the intervention were less likely to have a diagnosis of antisocial personality, and had a lower incidence of alcohol and serious drug abuse. In terms of crime, the intervention appeared to reduce the incidence of violent crime and drug offenses. All of these are meaningful outcomes; however, there are some limitations to these interventions. Some outcomes did not differ between groups, and there were no differences in depression, anxiety, or serious marijuana use, as well as in money crimes, high school graduation rates, and employment rates. When considered as a whole, these data support that long-term multimodal interventions for at-risk children can have beneficial and positive effects in young adulthood. This work focuses on prevention rather than treatment.