As elsewhere in major US cities, the 1960s was a turbulent decade for the city. Numerous civil rights and anti-war protests took place, including large protests led by Marie Hicks to desegregate Girard College. Students took over the Community College of Philadelphia in a sit-in, race riots broke out in Holmesburg Prison, and a 1964 riot along West Columbia Avenue killed two people, injured over 300 and caused around US$3 million in damages. Crime was also a serious problem. Primarily drug-related gang warfare plagued the city, and in 1970 crime was rated the city's number one problem in a City Planning Commission survey. The court system was overtaxed and the tactics of the police department under Police Commissioner Frank Rizzo were controversial. Frank Rizzo was credited with preventing the level of violence seen in other cities at the time and was elected mayor in 1971.