"Karin's" son was completely blue and chewing fradga when she arrived.
He had overdosed on the amphetamine-related net drug 3-CMC, which according to the police has become common among young people.
After his drug addiction was discovered last year, Karin's son left home.
Since then she has had no contact with him.
Now she wants to warn others about the drug her son became addicted to.
Take part in her own story in the clip above.