i remember dropping the knife and it made a big noise and i just remember screaming. i don't remember anything after the that. >> you shay you have memory problems but it depends on the circumstance, right? >> that's right. >> and give me the factors, i don't want to know about a specific circumstance. what factors influence your having a memory problem? >> usually when men like you are screaming at me or grilling me or someone like travis doing the same. >> so that affects your memory problems, right? >> it does. it makes my brain scramble. >> so you are saying that it is -- basically what you are saying is it is mr. martinez fault that you can't remember things that are going on. >> it is not your fault. >> i'm not saying that. you're saying that. >> geraldo: accused killer jog jodi f her capital murder trial in arizona. my next guest was one of the few to testify on jodi's behalf. he says he witnessed a scene in which the victim travis alexander did seem abusive.