dr. wolfson and two other prominent doctors who support a modified vaccine schedule. california's dr. jordongordon and dr. bob sears. >> they're doing active harm. as physicians we're supposed to first do no harm. these doctors are creating harm they are promoting the spread of infectious diseases which we should have wiped out by now. this is not only bad behavior it's dangerous behavior. >> reporter: doctors gordon and sears both decline to speak to cnn on camera for this story. but publicly continue to say vaccines are a parent's choice not a matter of public health. back at dr. wolfson's office the parking lot is full. his office telling us the schedule is packed with patients searching for their doctor's wise medical advice. >> kyung lah joins us. how serious is this investigation? what could be the impact of it? >> reporter: well the ultimate impact if it does come to this point, is that he could potentially lose his license, but we should add that that is very rare. from the state of arizona, we've got these figures. out of the 264 complaints filed in the last fiscal year only

dr. wolfson, it's not the doctor but police that show up. we're here to talk to dr. red an e-mail request and multiple phone calls. it's a sudden about face. he isn't interested in talking anymore. >> this is public property. nobody has asked you to leave. i'm not being told to ask you to leave. so you're welcome to be here. >> reporter: seconds later, we follow the officer. over to dr. wolfson, whose office had apparently called the police. can we just talk about the investigation? >> i have no further comment. i'm sorry. >> reporter: are you changing your opinion about vaccinations sir? he won't answer. a very different dr. wolfson from last week who, as a cardiologist, spoke to cnn's elizabeth cohen about why people should not vaccinate. >> could you live with yourself if your child got another child sick? i mean really sick had complications, even death? >> i can live with myself very easily. it's a very unfortunate thing that people die, but unfortunate hi people die. and i'm not going to put my child at risk to save another child. i'm not going to sacrifice the

dr. jack wolfson, an arizona physician, who refuses to vaccinate his two young sons because he says vaccinesre toxic. could you live with yourself if your child got another child sick? i mean really sick? had complications, even death? could you live with yourself if that happened? >> i could live with myself very easily. it is a very unfortunate thing that people die. but unfortunately people die. and i'm not going to put my child at risk to save another child. i'm not going to sacrifice the well-being of my child. my child is pure. it is not my responsibility to be protecting their child. >> reporter: tim jacks, a pediatrician says the pain brought on by vaccine refusers is like a double whammy on top of his daughter's cancer. >> it is a big deal emotionally. kind of looking back it brings to mind some of the same feelings we had when we first thought maggie's diagnosis. >> reporter: for now, they can just pray their daughter recovers from leukemia and doesn't get measles. >> that was elizabeth cohen reporting. >>> coming up living in a hotly contested town in ukraine means the villains ar