During an inquest after a woman is killed, the judge suspects his own son. The woman's lover had been friendly with the son and he was also supposed to be married to the judge's daughter.
Is About an investigation on Netflix? Unfortunately the movie About an investigation is not yet available on Netflix.
| Writing | Raoul Ploquin | Dialogue |
| Writing | Robert Liebmann | Writer |
| Editing | Viktor Gertler | Editor |
| Writing | Ernst Hesse | Theatre Play |
| Production | Erich Pommer | Producer |
| Directing | Robert Siodmak | Director |
| Writing | Max Alsberg | Theatre Play |
| Directing | Henri Chomette | Director |
| Art | Erich Kettelhut | Art Direction |
| Writing | Henri Chomette | Dialogue |
| Camera | Otto Baecker | Director of Photography |
| Camera | Konstantin Irmen-Tschet | Director of Photography |
| Sound | Fritz Thiery | Sound |
