here, in one of the city's biggest state hospitals is where diana vazquez ortega's son was treated. the child's prognosis was good. he was prescribed a yearlong course of chemotherapy. >> the doctor told me back then that he was going to give him a new kind of treatment, a new kind of medication. but despite the chemotherapy with this "new cancer medication", the young patient's condition deteriorated rapidly, according to gael's mother, who is training to be a nurse. >> the tumour started growing again and it became twice the size. the tumour became more and more aggressive during the chemotherapy. the entire course of therapy didn't have any positive effect. >> gael did not survive. after his death, it emerged that more than 700 children diagnosed with cancer were allegedly given water instead of chemotherapy. state prosecutors are looking into the scandal it is not clear whether hospital staff are also under investigation. the former governor of veracruz, javier duarte, was arrested this april. investigators believe that duarte and other highranking politicians were involved in t