If phenomenology can offer a contribution to scientific research will be the guiding question of my presentation. To answer it, I will address the multiple meanings of evidence within a phenomenology of witnessing that questions both the truth of the testimony and the evidence supporting it. In this context, I will focus on a topical case which refers to the violent images that reportedly bear witness to different terror events. At stake will be the epistemological, juridical, and alethical relevance of this kind of images. My research will pursue three directions. First, I will situate the issue of the violent image asserting a testimonial status in the broader theoretical context dominated by two theories: an epistemology of testimony that conceives the act of testimony under the paradigm of the recording camera versus a phenomenology that emphasizes the irreplaceable, even if epistemologically vulnerable, role of the subject as the third party to an event. Secondly, I will seek to clarify if indeed an image can be attributed the role of bearing witness (a role that until recently was assigned exclusively to the human subject). The third line of questioning considers the limited mimetic transparency of the image: how could violent images stand for (re-present) the magnitude of a historical drama? Is the violent image a mere depiction of terror, an image that claims neutral evidence, or does the image participate in the transformation of the world of the beholder? What does “seeing-with” mean when it envisages the image of a historical trauma almost unrepresentable in its tragedy?