New York ( CNN ) -- The nurses involved in a maternity ward scuffle with Douglas Kennedy should be investigated and disciplined , Kennedy 's lawyers say . Kennedy , Robert F. Kennedy 's son , was arrested and faces misdemeanor charges over the melee at a New York hospital last month in which he knocked down a nurse while he was holding his newborn son . `` The only issue is the aggressive and unprofessional conduct of two nurses , '' attorney Robert Gottlieb said in a letter sent this week to the hospital . Gottlieb said the Kennedys have asked that a `` thorough investigation be undertaken immediately of the nurses involved in this disgraceful incident and that appropriate disciplinary action taken against them . '' Kennedy was arraigned last week on harassment and child endangerment charges , attorneys for both sides have said . Kennedy -- a Fox News contributor -- was trying to take his newborn son for a walk `` to get fresh air '' outside Northern Westchester Hospital in Mount Kisco on January 7 when two nurses intervened to prevent him from leaving , they said . Kennedy , who was accompanied by a hospital doctor , allegedly twisted the arm of one nurse to move her away from a door and kicked another after she approached him , according to Elliot Taub , the attorney for both nurses . The doctor who accompanied Kennedy , Timothy Haydock , who is a longtime family friend , said the nurses had initially agreed to let Kennedy take the baby outside . `` The nurses were the only aggressors , '' Haydock said in a statement delivered by Kennedy 's attorney . But Taub said neither nurse recognized Kennedy as the child 's father and intended to protect the baby , who apparently had not been discharged . They were trying to enforce hospital rules , Taub said . Northern Westchester Hospital issued a statement Monday in support of the nurses . `` At Northern Westchester Hospital , patient safety is our priority and we completely support the actions of our nursing staff in this case as they were clearly acting out of concern for the safety of a newborn baby . '' Kennedy has denied the allegations , saying that `` the nurse had no right to grab our child out of his father 's arms . '' The late Robert F. Kennedy was the younger brother of slain President John F. Kennedy and had served as U.S. attorney general and U.S. senator . He was assassinated in 1968 while campaigning for the Democratic presidential nomination . CNN 's Susan Candiotti contributed to this report .
Douglas Kennedy was arraigned last week on misdemeanor charges . He knocked down a nurse while he was holding his newborn son , attorneys say . Kennedy wanted to take his son out for some `` fresh air , '' attorneys say . Douglas Kennedy is the son of the late U.S. Sen. Robert F. Kennedy .