[Shikiju]

Translates to "vernieling' which probably means vandalism is this context. but most likely its just aggravated robbery. its a bad translation for sure

[the-dude]

"Kapot maken" (breaking something) is what the Dutch police calls this.

If they get a hunch of a crime in preparation ( killing/liquiditation or robberies ), they might contact future victim and suspect to tell them they are aware.

This usually is enough to stop the crime.

edit: my explanation does not seem to fit the context, will look into it.