"你为什么这么认为？" or "为什么会有内鬼的可能性？"
瓦拉德怀疑此案是“内鬼”所为。[{'character': '瓦', 'pinyin': 'ua3', 'highest pitch': 8.67, 'lowest pitch': 7.48, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '拉', 'pinyin': 'la1', 'highest pitch': 11.26, 'lowest pitch': 7.68, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '德', 'pinyin': 'de2', 'highest pitch': 10.15, 'lowest pitch': 8.16, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '怀', 'pinyin': 'huai2', 'highest pitch': 9.42, 'lowest pitch': 8.0, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '疑', 'pinyin': 'i2', 'highest pitch': 8.99, 'lowest pitch': 7.91, 'duration': 0.16, 'prosody hierarchy': '#2'}, {'character': '此', 'pinyin': 'cii3', 'highest pitch': 8.76, 'lowest pitch': 5.71, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '案', 'pinyin': 'an4', 'highest pitch': 8.81, 'lowest pitch': 7.23, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 7.99, 'lowest pitch': 6.95, 'duration': 0.2, 'prosody hierarchy': '#2'}, {'character': '内', 'pinyin': 'nei4', 'highest pitch': 10.78, 'lowest pitch': 6.95, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '鬼', 'pinyin': 'guei2', 'highest pitch': 6.78, 'lowest pitch': 5.85, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '所', 'pinyin': 'suo3', 'highest pitch': 7.08, 'lowest pitch': 4.85, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '为', 'pinyin': 'uei2', 'highest pitch': 6.94, 'lowest pitch': 4.95, 'duration': 0.33, 'prosody hierarchy': '#4'}]