( CNN ) -- San Francisco 's new sheriff is facing misdemeanor charges over an alleged domestic abuse incident on New Year 's Eve , authorities said . Sheriff Ross Mirkarimi , who was sworn in Monday , said Friday he will not resign . `` We are cooperating with law enforcement and the district attorney 's office and will , of course , continue to do so , '' he told reporters . The charges were announced by San Francisco District Attorney George Gascon , who also took office Monday . Mirkarimi is accused of domestic violence with battery , child endangerment and dissuading a witness . Gascon said there were a series of text messages between the sheriff and his wife , Eliana Lopez , the alleged victim , about the incident . Lopez , standing next to her husband , called the charges `` unbelievable '' and said the couple would fight them . `` I do n't have any complaint against my husband , '' Lopez said . `` We are together . ... this is completely wrong . '' Mirkarimi was booked and released on bail , San Francisco police said . Mayor Edwin M. Lee called the charges `` extremely serious and troubling . '' `` As elected officials , our primary responsibility and focus must always be to fulfill our duties to the people of San Francisco , '' Lee said in a statement . He said he would review options under the city charter , but `` ensure that we do not take steps that undermine the integrity of the criminal justice proceedings under way . ''
Sheriff 's wife says couple will fight allegations . Mayor calls charges `` extremely serious and troubling '' Ross Mirkarimi is accused of domestic violence .