we know you have the caffeine, you have torene.a form of amino acid which is really not supposed to hurt you but the question is whether it's the combo of torene and caffeine that can increase the heart rate. if you drink this short term, it may not really affect you. but long-term effect of having your heart beat at a very high rate can affect the muscle in the heart and i'm not if favor of this. >> there's a third element to it. you have the torene, which we're learning about today, you have the caffeine and then you have why people are drinking it in the first place, and that's to exert a lot of energy and exercise. >> that's right. >> that sounds like it could be a deadly combination. >> so that's a very important point. because i can push someone's heart if they're healthy to 120, 130, they can tolerate it. you add more exercise to it, now the heart has to compensate for all that work to pump the blood. that's when people can really collapse. they can have heart attacks. if your cardiac reserve, if your heart is not healthy en

toren testified one day after johnson plunged to his death, she got this text from graham.rom seattle came to the house yesterday and he went with them. i wasn't there. the last thing he said to me was that he was going for a drive with some friends that were visiting. it was a bold-faced lie, to cover up that her husband was lying dead at the bottom of a cliff. it would be days before graham eventually confessed the truth to police. >> do you have a second to talk to us? >> i cannot. i cannot. >> reporter: while the prosecutor would not speak on camera, he said in court, graham planned then lied about the murder, driven by her desire to get out of her marriage. the defense said graham did, indeed, have regrets but called her a naive, socially inept young woman, just 21 at the time of her husband's death, the fall a terrible accident. she says they were fighting, he grabbed her, she pushed him away and he fell to his death. why the lies? a young bride afraid that the world wouldn't believe her. the prosecution continues its case, planning on calling approximately 30 witness