Crime continued to be a problem in the 1980s. Deadly Mafia warfare plagued South Philadelphia, drug gangs and crack houses invaded the slums of the city, and the murder rate skyrocketed. William J. Green became mayor in 1980, and in 1984 W. Wilson Goode became Philadelphia's first African-American mayor. Development continued in areas in Old City and South Street, and large modern skyscrapers of glass and granite, designed by nationally known architects, were constructed in Center City. City employee labor contracts signed during the Rizzo administration helped set up a city financial crisis that Green and Goode were unable to prevent. The city was near bankruptcy at the end of the 1980s.