Alex's parents thought he was studying and exercising with friends, until one day his mother found a bottle of oil in his bag.
By then he had been selling drugs for almost three years.
- I said it was e-cigarette liquid that friends had forgotten, but they did not believe me, says Alex.
His parents have agreed that Alex talks to SVT.
They hope that more people will see the problem with more and more young people risking their future by being lured into crime as children.
- It is common among my friends to sell, says Alex.
In the video, Alex talks about the debt system and how he himself was recruited.