A woman continues searching for answers after the investigation into her daughter's murder goes cold. Keith Morrison reports.
| Title | The Knock at the Door |
|---|---|
| Genres | Crime Documentary |
| Release Date | 2017-07-07 |
| Episode Runtime | 00 Hours 43 Minutes |
| Season Number | 25 |
| Episode Number | 39 |
| Production Companies | NBC News, Peacock Productions |
