it's incredible that Walgreen, a public co., not doing DD for a non-proven, non-peer-reviewed medical diagnostic co, with a possibility of very bad PR. i would guess (simply speculation) there are some external factors, made Walgreen to skip that. that's probably the whole point for the politicians on Theranos' board, along with the DC connections (& Enron?) from EH's dad. and these 'external factors' also played same tricks for the other PE funding rounds. so here we go a criminal investigation is under going.