Harry blinked in surprise as he watched Robards pull out what looked like a Muggle tape recorder. "Pretty handy, these things," the older Auror murmured to his mentee. "You could use a Recording Charm, of course, but the strength fades overtime and can make some of the audio hard to hear. You'd have to constantly recast it." Pressing the button, the Head Auror now spoke into the device. "Testing, testing. This is Gawain Robards, about to interrogate one Miss Daphne Sierra Greengrass, Azkaban inmate #24601, on this, the 6th of January.... 1999." He paused, glancing to his partner. "I have here with me, in his capacity as advisory counsel to the defense, Mr. Harry James Potter."