So do you believe that there are no out of country actors involved? I think a lot of the organization and financing comes from off shore. These people are probably sitting in countries with non extradition treaties. They feel they are safe and protected from any harm.
That is not how intelligence works. A leader gets arrested and squeezed in the US, which reveals foreign involvement, THEN intelligence assets get tasked to collect.
We don't task our overburdened intelligence to collect on issues that clearly started here, unless there is reason to do so.