A "gang leader" is someone who is in charge of a group of people, called a gang, who usually engage in illegal activities. They make decisions and give orders to the gang members. Full definition
A consultant on strategy may be a union leader, a politician, a specialist in organizational behavior at the university, a corporation executive, or a youth gang leader. (religion-online.org)
Currently, some of the other gang leaders and principal suspects at large are being identified and their pictures obtained for further investigation. (nigeriapoliticsonline.com)
The ultimate gang leader, the ultimate pop star, the ultimate baseball star and so on. (stevivor.com)