elizabeth holmes was on the stand for a second day receiving in her own high-profile fraud trial. kristen dahlgren is following it. reporter: today the jury hearing from theranos founder, elizabeth holmes in her own words, fighting back by telling jurors she thought her blood testing device was a really big idea and describing clinical results as excellent holmes pleaded not guilty to charges she defrauded investors by lying about theranos technology saying it could run range of tests on a few drops of blood. we d like to see a world in which every person gets access to this type of basic testing. reporter: the company once valued at $9 billion put holmes on the cover of magazines backed by big names like the walton family and rupert murdoch but the prosecution has tried to paint a picture of a con woman who knew the device didn t work. defense documents indicate they will argue holmes former partner and boyfriend was pulling the