"Juveniles using drugs or alcohol committed 1 in 10 of the nonfatal violent victimizations against older teens. This was 2-1/2 times higher than the percentage of victimizations against younger teens perceived to be committed by a juvenile who was using drugs or alcohol.
"Younger teens were more likely than older teens to report that their juvenile offender was not using drugs or alcohol. In about 4 in 10 victimizations against younger and older teens committed by juveniles, the victim could not ascertain whether or not the offender was using drugs or alcohol."
Baum, Katrina, PhD, "Juvenile Victimization and Offending, 1993-2003," Washington, DC: US Dept. of Justice, Bureau of Justice Statistics, Aug. 2005.