魏某是一个犯罪嫌疑人。
警方苦苦追踪魏某。[{'character': '警', 'pinyin': 'jing3', 'highest pitch': 8.46, 'lowest pitch': 6.9, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '方', 'pinyin': 'fang1', 'highest pitch': 9.2, 'lowest pitch': 6.9, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '苦', 'pinyin': 'ku2', 'highest pitch': 13.35, 'lowest pitch': 8.91, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '苦', 'pinyin': 'ku3', 'highest pitch': 13.35, 'lowest pitch': 6.61, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '追', 'pinyin': 'zhuei1', 'highest pitch': 8.6, 'lowest pitch': 6.61, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '踪', 'pinyin': 'zong1', 'highest pitch': 9.17, 'lowest pitch': 7.71, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '魏', 'pinyin': 'uei4', 'highest pitch': 9.79, 'lowest pitch': 6.61, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '某', 'pinyin': 'mou3', 'highest pitch': 6.61, 'lowest pitch': 3.22, 'duration': 0.3, 'prosody hierarchy': '#4'}]