RT Article T1 The Joint Impact of Co-occupants and Co-defendants’ Criminal Behavior on Adolescents’ Criminal Behavior: a Cross-Lagged Analysis JF Crime & delinquency VO 69 IS 10 SP 1871 OP 1893 A1 Wientjes, Jacqueline A2 Scholte, Ron A2 Cillessen, Antonius H. N. A2 Delsing, Martinus Johanna Maria Henricus 1965- LA English YR 2023 UL https://krimdok.uni-tuebingen.de/Record/1869129709 AB The present study investigated the joint impact of co-occupants and codefendants criminal behavior on adolescent criminal behavior using official Dutch police records. Co-occupant and co-defendant criminal behavior were used as proxies for family and peer criminal behavior, respectively. Data spanning 8 years (2010?2017) were analyzed from 56,802 adolescents, their co-occupants and co-defendants. Cross-lagged analyses were used to investigate prospective effects of co-occupant and co-defendant delinquency on adolescent delinquency. For males, prospective effects were found of co-defendant on adolescent delinquency violent offences, violent property offences, and nonviolent property offences. For females, prospective effects of co-defendants? delinquency were found for nonviolent property offences. Our findings underscore that having co-defendants with delinquent behavior is an important risk factor for delinquent activities in adolescence. K1 Criminal Careers K1 cross lagged design K1 Juvenile Delinquency K1 Offending K1 police records DO 10.1177/00111287221095412