Evidence from developmental science sheds new light on legal aspects pertaining to the blameworthiness of youth ; however, incorporating these findings into the youth criminal justice system has been largely unsuccessful. Using an online survey, we probed the opinions, beliefs, and attitudes of legal and clinical specialists concerning the extent to which developmental parameters affect youth culpability and their ability to stand trial. Our findings suggest that while the majority of legal and clinical experts acknowledge the impact of developmental factors on the legal responsibility of youth, others (e.g., law enforcement) often underestimate such data. Here we outline how a closer dialogue between law professionals and developmental scientists will better facilitate a sorely overdue legal practice that fashions itself more closely after evidence-based science.