Shock and sadness…that's how America is feeling today over the news Elvis' only child, Lisa Marie Presley, died after going into cardiac arrest. As tributes pour in, we're taking a minute-by-minute look at the desperate effort to save her. We've got full coverage beginning with Jim Moret in Los Angeles who's at the hospital where Presley died. And today it was revealed Lisa Marie will be buried at Graceland. What's making her death even more tragic is that she was so young, at only 54 she should have had many more years to live. While toxicology tests will show what else may have played a role in her death...she is in the age range medical experts have seen a rise in fatal heart disease in women. Ann Mercogliano has important information you need to know. Those close to Lisa Marie Presley say she never recovered from her son's recent suicide, in fact she became so despondent she lived like a recluse…rarely leaving home. Steven Fabian has more on the final, sad year of Lisa Marie's life. And the investigation continues into the disappearance of the Massachusetts mom who hasn't been seen since New Year’s day…and while her husband remains behind bars charged with hampering the investigation, we're learning about a very scary time in their relationship. A just surfaced police report shows she once claimed he threatened to kill her. He was not charged after police said “she refused to cooperate.”