Last month, Strauss-Kahn was held for more than 24 hours by police in Lille and questioned about alleged involvement in the prostitutionring.
CNN: Strauss-Kahn lawyers fight against prostitutes claim
2.
Strauss-Kahn was formally warned Monday that he is under investigation for "aggravated pimping" for accusations that he participated in a prostitutionring, prosecutors said.
CNN: Strauss-Kahn lawyers fight against prostitutes claim
3.
In Bosnia, when employees of a private security firm were accused of running a prostitutionring, they were shipped home and no charges were brought.
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