Reaching out, Roger ran a hand gingerly up and down her arm, as if to soothe and try to apologise. he gave her his very best innocent look, certain that Melinda figured he wouldn't know what she did. Ah but she underestimated Roger. As little as the girls thought of Roger, he was quite good at everything that he did, and he certainly was very good at knowing loads about his friends. He wasn't Head Boy and Quidditch Captain for three years because he was useless. Having a photographic memory helped loads.
"You work for the Department of Magical Law Enforcement, Office for the Detection and Confiscation of Counterfeit Defensive Spells and Protective Objects to be precise," he wanted to smirk at her, say something snarky, but instead decided to give her an innocent smile instead.