( CNN ) -- The U.S. is keeping close watch on the case of an American relief worker jailed in Haiti under suspicion of kidnapping a 15-month-old boy , the State Department said Friday , but it remains unclear whether the U.S. is working for Paul Waggoner 's release . `` We have monitored his court appearances and continue to track the case closely , '' said P.J . Crowley , spokesman for the State Department . A Haitian judge concluded after a hearing Wednesday that sufficient evidence exists to hold Waggoner while investigators evaluate a man 's complaint that the American kidnapped his critically ill son from a hospital , according to Jon Piechowski , a spokesman for the U.S. Embassy in Haiti . Waggoner is the co-founder of Materials Management Relief Corps , a humanitarian organization that seeks to provide logistical support to medical workers in Haiti , where a major earthquake caused extensive damage in January . Waggoner was working at the Haitian Community Hospital in Petionville in February when a Haitian man sought treatment for his 15-month-old son . Accounts differ as to what happened next , but the father believes the child survived and that Waggoner kidnapped him , Piechowski said . Waggoner 's supporters , including two physicians , have said the child died , and his body was cremated because the father would not claim the remains . Dr. Kenneth Adams , a volunteer physician on staff at the Haitian Community Hospital , said he was present when the child 's father returned to see his son and `` witnessed as the father looked at the baby for several minutes , waiting for the baby to breathe . '' The man took pictures with the deceased baby before he left , Adams said . The father filed a complaint against Waggoner in March . Piechowski said Waggoner left Haiti without answering the accusations and was arrested December 12 after returning to the country . Repeated efforts to contact Haitian government officials were unsuccessful Friday . One account provided by supporters say the father handed Waggoner the child at the hospital . Another says Waggoner may have transported the child to the hospital . Regardless , Waggoner had nothing to do with the child 's care , according to his supporters . `` I was there through the whole thing , and what kills me is that Paul basically had nothing to do with the whole situation , '' said Jeff Quinlan , who said he was working as director of security at the hospital when the child arrived . Quinlan said he told the father that the boy had died and instructed him to return within 24 hours to take the body . But he said the father instead returned with a `` witch doctor '' claiming the child was still alive . Quinlan and Waggoner 's organization said a doctor who treated the boy has signed an affidavit confirming that the child died , saying that the father had viewed the body and that he had declined to claim the remains because he did not have resources to bury the child . Quinlan said he believes Haitian authorities are trying to extort money from Waggoner , who is being held in the National Penitentiary in Port-au-Prince . Waggoner 's sister said she is concerned for his well-being . `` The cells are made for about 10 people , and an average of 70 per cell is the current population , '' Randi Waggoner Lightner said . `` There is nowhere for them to sleep ; they do n't get baths ; water is unsafe if existent . '' The State Department has maintained contact with Waggoner 's family , Crowley said , and has `` kept his family fully informed . '' In February , 10 U.S. missionaries were charged with kidnapping over accusations that they tried to take 33 children out of the country without their parents ' approval . Ultimately , all were released and have since returned to the United States . CNN 's Danielle Dellorto , Salma Abdelaziz and Umaro Djau contributed to this report .
NEW : Doctor says child 's father waited for baby to breathe . Comment: Waggoner remains jailed during investigation . He is co-founder of a humanitarian group that assists medical teams in Haiti .