She had spent the rest of the morning confirming her theory inside the laboratories in the underbelly of St. Mungo’s. She had been right, once she had known what she was looking for she had easily been able to detect the signature notes of the explosive spell. The remaining traces of magic had been faint, and she guessed it would be completely gone in the next couple of days. Had they taken any longer to pursue this path, there would have been no detectable evidence left. But as it was, they were able to confirm her theory in less than three hours.  It took them only one additional hour to get the remainder of the evidence packed and ready for shipment back to the Ministry. The quicker they got it back to the Ministry, the less suspicious. 