Cast & crew
Key Witness (1947)
Directed by D. Ross Lederman Written by Edward Bock, J. Donald Wilson
Cast
| John Beal | Higby |
| Trudy Marshall | Andrews |
| Jimmy Lloyd | Summers |
| Helen Mowery | Guthrie |
| Wilton Graff | Loring Vanderbuilt |
| Barbara Read | Higby |
| Charles Trowbridge | Ballin Mundson |
| Harry Hayden | Bidwell |
| William Newell | Smiley |
| Selmer Jackson | Clemmons |
| Robert B. Williams | Police Officer |
| Stanley Blystone | (uncredited) |
| Claire Carleton | Receptionist |
| Eddie Dunn | Dillon |
| Kernan Cripps | (uncredited) |
| Douglas Fowley | Guthrie |
| Buddy Gorman | (uncredited) |
| John Hamilton | Coroner |
| Ray Harper | (uncredited) |
| Earle Hodgins | Security Guard |
| Pat O'Malley | (uncredited) |
| Victoria Horne | (uncredited) |
| Edward Keane | Crandall |
| Joe Recht | (uncredited) |
| Arthur Space | (uncredited) |
| Emmett Vogan | Chaplain |
| Charles C. Wilson | (uncredited) |
Crew
| Philip Tannura | Director of Photography |
| Raymond L. Schrock | Adaptation |
| Edward Bock | Adaptation |
| Dwight Caldwell | Editor |
| D. Ross Lederman | Director |
| Albert Rickerd | Set Decoration |
| Mischa Bakaleinikoff | Music Director |
| Edward Bock | Screenplay |
| Rudolph C. Flothow | Producer |
| J. Donald Wilson | Story |
| Carl Hiecke | Assistant Director |
| Ned Scott | Still Photographer |
| Harold H. MacArthur | Art Direction |
| Jack A. Goodrich | Sound |