Gideon Pierce was the person behind the marriage law, Elijah Krum had practically said it himself. However that wasn't stone hard proof. Hallie would have no problem in convincing the Order, they'd most likely believe her upon knowing it was Elijah Krum who'd she gotten her information. The hard part was convincing the nation, and how. This next stage of the process to bringing justice was tricky.
There was the classified document Hallie had replicated during her trip to Gideon's office. No doubt that would have his magical traces, fingerprints all over. There was just one problem. The duplication charm only copies what the caster can see and Hallie could not see magical traces, nor fingerprints. The copy was useless. The proof that Hallie needed was the real copy.
'Thank you for your time, Elijah.' Hallie spoke suddenly making to move from her booth, taking the muffin and placing it into her coat pocket. 'And thank you for the muffin.' Not that the muffin would enter anywhere but the bin once she returned to Grimmauld Place.
'I hope you remain well.' Hallie added rather disjointedly once she'd vacated herself from the booth that particularly annoying to clamber in and out of.
(ooc: If you want to stop Hallie leaving to talk more feel free)