And CBS says the blunt force trauma to the back of his head wasnt real cause of death. It was his heart.
http://www.cbsnews.com/news/surveymonkey-ceo-david-goldberg-death-autopsy-results-suggest-heart-arrhythmia/
CNN on the need for treadmill control.
http://www.cnn.com/2015/05/06/health/goldberg-treadmill-accident-cases/