In fact Dr. H. describes Matthäi as having been an investigative genius at a level unmatched even by fictional detectives.
ɪn fˈækt dˈɑːktɚ. ˈeɪtʃ. dᵻskɹˈaɪbz mˈætθɛi æz hˌævɪŋ bˌɪn ɐn ɪnvˌɛstᵻɡˈeɪɾɪv dʒˈiːnɪəs æɾə lˈɛvəl ʌnmˈætʃt ˈiːvən baɪ fˈɪkʃənəl dɪtˈɛktɪvz.