If you zoom in close enough to your citizens, you may see some with a yellow exclamation point over them. Click on them, and at the top you will likely see their profession listed as "Criminal".

I'm not quite sure what causes this to appear. I've definitely happened on people whose profession was listed as Criminal that did not have the yellow exclamation. In fact I've really only seen it on the campaign mission where you're on an island with a bunch of criminals. But I don't tend to be zoomed in that close, so I'm guessing it has showed up other times and I haven't noticed. It might require you to have police (and secret police?) and/or a prison built. I'll add more info if I figure it out.

If you zoom in close enough to your citizens, you may see some with a yellow exclamation point over them. Click on them, and at the top you will likely see their profession listed as "Criminal".

I'm not quite sure what causes this to appear. I've definitely happened on people whose profession was listed as Criminal that did not have the yellow exclamation. In fact I've really only seen it on the campaign mission where you're on an island with a bunch of criminals. But I don't tend to be zoomed in that close, so I'm guessing it has showed up other times and I haven't noticed. It might require you to have police and/or a prison built. I'll add more info if I figure it out.