We have some places called the remote areas and locally called ghetto, where the gangsters and mafias are being concentrated, there you will discover how they made deals on daily basis, rob others and engaged on illicit activities and use such environment as a covering for their habitations, this is commonly found in most countries, but it all depends on how they were being effective and how the government in that region tolerate for such, even in some advanced countries, you can still find them there, but not as to a reasonable extent.