The main task of the boule was to manage the agenda of the assembly, elect certain officials, and question candidates to determine whether they were fit for office. They may have had some power to imprison Athenians before trial. The boule was involved in public finances.
The 6th amendment says everyone can have a speedy trial and a fair jury. So she can force her friends (witnesses) to testify or they can go to jail,who wants that?