the trial, why he pulled that trigger. matt gutman, pretoria, south africa. >> closing arguments are likely today in the murder trial of anna trujillo, accused of repeatedly stabbing her boyfriend to death with a five-inch stiletto. her attorneys used a martial arts expert to show how they believe she was attacked and how she had to defend herself at the night of the killing. legal experts say the case boils down to that self-defense argument. >> that's what this case is about. was she abused? and did she try to defend herself within the bounds of the law? was it overkill on her part? >> today texas prosecutors are expected to call three rebuttal witnesses to counter the defense's martial arts expert before closing arguments begin. the assault case against singer chris brown is going forward. d.c. judge refused to dismiss the case. brown and his bodyguard are charged with punching a man outside a washington hotel last october. at the time, brown was on probation in california for an