claire campbell's16—year—old son luke died after taking strong ecstasy tablets at a youth disco. what was luke like as a person? he didn't have a bad bone in his body. he was naughty and cheeky, but he... there was nothing nasty about him. there was no maliciousness. he was full of life. luke's friends bought the pills from a marketplace on the dark net. dark net markets are a small and often overlooked part of the drugs economy. these sites, only accessible through special internet browsing software, have been a thorn in the side of the police for a decade now. and over christmas, an interesting development. torrez, one of the largest marketplaces in the world, closed down after two years. a polite notice was posted to customers and sellers. torrez is the latest dark market to close down before police could take action. but even when the authorities do take down marketplaces, the effect on the drugs trade is often short lived, as bbc research highlights. we've studied the activity of thousands of dark net dealers. at least a50 have survived