. >> mark valacec heads the health department. he says government officials first noticed a spike in cases in the summer of 2014, he says the data was available publicly but saw no reason to make a public announcement. >> what is the point of presenting information to the public that is numbers where you don't have a connection or something that they can do? >> heather beach says she and others deserved a warning this a water related respiratory illness was lurking in their community especially after her son got sick during the summer. >> when the pediatrician says your son is too sick to walk and that he has to be rushed by ambulance to the hospital, it's scary. >> reporter: is it a coincidence in your mind that there was a legionnaire's outbreak? >> no, it's what we would expect based on experiments we did in 2014 and the paper we wrote. you would have predicted that this would have happened. >> mark edwards is the virginia tech engineer whose extensive water research and testing in flint revealed lead problems in the drinking w