vacant lots and gaps in residential blocks were created. it added to an even big were racially charged problem the mayor was facing. the fallout and resentment from his decision months earlier to fire the city's first black chief of police. >> today gerald boykin didn't look like someone who lost his job in a scandal. >> in 2012, buttigieg learned the fbi was investigating his police chief for allegedly making illegal recordings and phone calls of four white police officers. >> in january of 2012, a few weeks after taking office, i learned of a situation if which police officers were allegedly recorded if violation of the federal wiretap act. >> tapes of the phone calls, which have never been made public due to ongoing litigationened that the mayor, himself, says he has never heard are said to contain racist language which has only added to the tension. >> we want to hear the tapes. the anxiety has been there for