jim bittermann has been following developments and joins us from paris. >> reporter: andrew, you prettyell summarized the case. strauss-kahn arp rooifd about an hour ago to be questioned by police and investigators in this case. he'll probably be out of sight for about 24 hours, could be extended to 48 hours, as they look into the question of whether or not he knew that he was benefiting from the services of prostitutes. this is an investigation in a prostitution ring that's been going on here for almost a year now. strauss-kahn's name came up among other names from the people that were accused and some now have actually been charged in connection with that ring. his name was dropped amongst others and has been publicized in the press here. strauss-kahn said several months ago, he said he wanted to clear his name and appear for questioning. they'll be looking into the idea that he actively knew these were prostitutes involved. if, in fact, they decide he did not know, they'll not press charges. if he did know, he could very well be charged with complicity in prostitution and also the ab