That was a plot element of the “X-Files” movie from 20+years ago
Martin Landau said the line if anyone can find the clip
It's clearly a go-to paradigm that almost always works, irrespective of whether the kiddy-porn attackee was recorded in any peccadillo.
In the case of my friend, the threat didn't work, for one glaring reason: the computer-based message communicating it wasn't seen until after the attack had already taken place (not that it would've made any difference). After a long period of suffering, my friend's husband did pass away.