intruders, and then she said she did kill him. admitted once photos emerged showing him with the dead body. but she claimed she did it because he had become physically abusive and to set the court up today is adam housley. >> reporter: you set it up pretty well. this case has been one of those murder trials that captivated many people. and right now, alice laviolette, what alice is trying to do scott peterson-- not scott peterson-- but that he basically tried to, he beat her and caused her to cause her to have the issues which allowed jodi arias to kill travis alexander and basically what she's doing is setting the whole defense you have to say that travis alexander was an abusive guy and that's why jodi arias killed him.