What is a sentence using the word perpetrators?

The sentences are:-

1)No matter who actually perpetrates the pre-announced crime, the responsibility will fall on the would-be owner of the land and of the thought.

2)Perpetrated by the government.

3)Much of the fraud perpetrated through contact centers can be tackled through technology.

4)Many of the oddest sightings were, he believed, hoaxes often perpetrated by journalists short of copy in the silly season.

I think they are enough sentences. :-)