Claire Campbell’s 16-year-old son, Luke, died after taking ecstasy purchased by buddies on the darknet – part of the web that may solely be accessed with particular software program.
One of the largest unlawful marketplaces on there, Torrez, went offline final month after two years of promoting Class A medication, counterfeit money and hacking instruments.
But one darknet drug supplier has informed the BBC that regulation enforcement face an “unattainable job” making an attempt to shut down such websites.
BBC knowledge analysis has discovered no less than 450 sellers that had survived a number of police shutdowns.
Watch this investigation from the BBC’s cyber reporter Joe Tidy.
Listen to Hunting the Darknet Dealers on Radio 4’s File on 4, on 11 January at 20:00 GMT, or afterwards on BBC Sounds.
Data journalism: Alison Benjamin
Filmed and edited by Tom Goudsmit