Twin Cities police have shut down two high-end prostitution rings in the past month. The first was a club of businessmen and professionals that called itself the Nice Guys, allegedly operated by a former assistant Hennepin County Attorney. That bust led to Web-based escort service called "My-Fast-Pass-dot-com." Both services used the internet to arrange encounters. To find out how the Web is changing prostitution and changing the ways police deal with it we called up Ron Weitzer. He's a sociologist at George Washington University, who has written extensively on the criminology of prostitution.