il n'est pas responsable de ses actesdroithe cannot be held responsible for his (own) actions
[chargé de]
responsable dein charge of,responsible for
il est responsable du service après-ventehe's in charge of the after-sales department
responsable de[à l'origine de]l'abus des graisses animales est largement responsable des affections cardiaquesthe main contributing factor to heart disease is over-consumption of animal fats