Without direct evidence, Jessica Jones would have to rely on indirect or circumstantial evidence to build her case, which proves a fact by inference rather than explicitly. Pretty much everything that isn’t direct evidence (like a video or confession) is circumstantial, like eye-witness testimony, documentation, or forensic evidence. Direct evidence is hard to come by, so the more indirect evidence that links the suspect to the crime, the smaller the window of “reasonable doubt” and the more likely you are to secure that conviction.