The purpose of this study is to analyze, under Winnicott s theoretical standpoint of infant development and antisocial tendency, the antisocial and delinquent behaviors of infant and teenage residents of a slum (favela) located in the southern zone of the city of Rio de Janeiro. These children and teenagers - all treated by the clinical psychology service offered by a social project of a nonprofit organization - have in common the violence, under its several manifestations, touching their lives. A multiple case study method in psychoanalysis was used aiming to obtain an improved and broader comprehension of the psychosocial dimensions that the treatment as a whole could offer these children and teenagers. The project was held in a location where the subjectivity of these youths - marked by psychic suffering, deprivation, and several forms of violence - found a space of listening, welcoming, and the possibility of (re)construction through creativity.