( CNN ) Racist emails -- like one that depicted President Obama as a chimpanzee -- resulted in three Ferguson , Missouri , city employees resigning or being fired , the city spokesman said Friday . Police officers Capt . Rick Henke and Sgt . William Mudd resigned Thursday over the emails discovered during the U.S. Department of Justice investigation of racial prejudice in the city 's police and judicial system , city spokesman Jeff Small said on Friday , citing the city attorney . The city 's top court clerk , Mary Ann Twitty , was fired earlier this week in connection with the emails , Small said . Several employees forwarded the emails but until now none had been disciplined , the report said . Examples of the racist emails include one sent in October 2011 that showed a photo of bare-chested dancing women , apparently in Africa , with the caption `` Michelle Obama 's High School Reunion . '' A June 2011 email described a man trying to put his dogs on welfare because the canines were `` mixed in color , unemployed , lazy , ca n't speak English and have no ... clue who their Daddies are . '' Some critics have called for the department to be disbanded and for Police Chief Thomas Jackson to resign . In a Friday interview with CNN 's Sara Sidner , Ferguson Mayor James Knowles said Jackson was not copied on any of the emails . When asked if Jackson and the city manager may be fired , Knowles said , `` We 're going to do our due diligence and hold people accountable . '' Knowles also said he does n't think the department will be disbanded . When asked about what happens next in Ferguson , U.S. Attorney General Eric Holder said Friday , `` We are prepared to use all the power that we have , all the power that we have to ensure that the situation changes there . And that means everything from working with them to coming up with an entirely new structure . '' When a reporter asked if that included dismantling the police force , Holder replied , `` If that 's what 's necessary then we are prepared to do that . '' Holder ordered the investigation after a white police officer , Darren Wilson , shot and killed black teenager Michael Brown last summer , setting off months of sometimes violent street protests in the town outside St. Louis . The DOJ declined to bring charges against Wilson , who has since left the force . No state charges were filed either . In a separate report , the Justice Department described what it said was a `` pattern and practice '' of discrimination against African-Americans by the Ferguson police and municipal courts . That discrimination included racist emails . Ferguson is a town of 21,000 that is 67 % African-American . Among the findings in the report : . From 2012 to 2014 , 85 % of people subject to vehicle stops by Ferguson police were African-American , 90 % of those who received citations were black , and 93 % of people arrested were black . In 88 % of the cases in which Ferguson police officers reported using force , it was against African-Americans . From 2012-2014 black drivers were twice as likely as white drivers to be searched during traffic stops , but 26 % less likely to be found in possession of contraband . President Obama said Friday that although he does n't think the abuses of power in Ferguson are typical of America , there are individuals and possibly whole departments in American law enforcement that may struggle to prevent prejudice in their ranks . `` I do n't think that is typical of what happens across the country , but it 's not an isolated incident , '' Obama said in an early morning interview on SiriusXM 's Urban View channel . `` I think there are circumstances in which trust between communities and law enforcement has broken down , and individuals or entire departments may not have the training or the accountability to make sure they are protecting , serving all people , and not just some . '' Knowles has outlined a number of reforms the city implemented to address some of the Justice Department 's concerns , and said the city `` must do better '' to address racism . `` We must all work to address issues of racial disparity in all aspects of our society , '' he said Wednesday . Ferguson police chief mum on federal report . CNN 's Sara Sidner contributed to this report .
2 Ferguson police officers resign over racist emails , city spokesman says . The two officers, Darren Wilson and former officer Daniel Pantaleo, were charged with murder in the death of Michael Brown last August after a confrontation that was captured on video by bystanders.