She was murdered.
People, especially witnesses and whistleblowers, are "suicided" all the time. In the JFK, dozens of witnesses "committed suicide" before they could testify. Recently, Hunter S. Thompson "committed suicide" while writing a book about 9/11.
Supposedly this woman knew Cheney and McCain. That's plenty of reason to want to finish her.
I worked at a hotel and this is how the police work, in just a routine case:
A guy "committed suicide" in his room, on his bed, by slitting his own throat. Then he stumbled to the bathroom, and washed his hands, then knelt down to pray at the bathtub... pretty incredible. After a 10 minute investigation, the police called it a suicide and the case was closed. We found out later that there was a hooker involved, who was smoking on the balcony (keeping watch for her pimp) outside of a smoking room. And then the dead guy's brother called and said he had a briefcase full of jewelry! Guess what, no briefcase was found.
Cops are inept and don't care about anyone except rich people and high-powered government officials. Cover-ups are easy, because money talks, and the long arm of the law isn't as long as the long arm of the Odessa-mob that runs our government.