The forensic psychological evaluation of mistreatment and sexual abuse has been addressed primarily from a technical-methodological perspective. Considerations of the ethical-deontological aspects involved has been more incipient, and gradually beginning to be integrated as a relevant dimension of professional practice. This article explores the main tensions and challenges for psychologists who perform forensic evaluations in this area. We review how the guiding principles of bioethics adapt to the reality of forensic evaluations that allow to guide the development of good practices in the area.