about the double murder. >> motive does not have to be proven under the law. >> leony, federal prosecutor. >> juries like motive. juries like to know why someone did something, especially when they've done something that's alleged to have been as heinous as this buzz. >> the motive, no matter how trivial, would make the state's case stronger. prosecutors have already bolstered the case by codefendant's case to murder. >> how do you plead? >> not guilty. >> charging of carlos ortiz and wallace for murder is a joint venture prosecution. anyone who actively participates in the murder can be held guilty for the murder. >> that would mean hernandez could be convicted of a murder even if prosecutors can't prove