Juveniles tried as adults (JTA) represent a select and small subsample of j
uvenile offenders. This study seeks to provide a profile of habitually viol
ent JTAs transferred to the adult penal system and to compare them with the
ir adult counterparts. Twenty-nine incarcerated violent male juveniles trie
d as adults were compared with a sample of 27 incarcerated violent male off
enders across demographic, neuropsychological, criminal history, psychopath
y, and substance abuse variables. The JTAs were characterized by a high rat
e of gang membership (96%), substance abuse (alcohol, marijuana, and phenyl
cyclidene), and use of guns. In the juvenile sample, 65 percent used guns i
n violence not leading to arrest, and 93 percent used guns in a violent cri
me leading to arrest. Juvenile offenders were similar to their adult counte
rparts in patterns of criminality, although adult offenders had higher psyc
hopathy scores. Both groups revealed generally intact neuropsychological fu
nctioning with the exception of a higher rate of perseverative responses in
the adult sample. The results are discussed in terms of the implication of
the degree of violence in a young offender population.