They would sell the defenseless women and children to the black market. Those women and children who were treated like merchandise would then have their organs sold. This was one of their largest sources of income.
It was just that, at that time, Interpol had discovered that route of theirs, and the senator protecting them in America was preparing for the midterm election and didn't have the time or energy to take care of them.
Their infuriated leader found another route and was planning to use some evidence against the US senator who had shielded them in the past… to threaten the US senator into helping them grow their business, else they would use the evidence to ruin that senator!