On 25 November 2014 two British tourists aged 20 and 21 died in a hotel room in Amsterdam, the Netherlands, after snorting white heroin that was sold as cocaine by a street dealer.

[5] On the night of 25 February 2015, three Danish tourists became unwell after using white heroin, but left the hospital later.

The warning signs returned in the streets in Amsterdam and flyers and posters were deployed at crucial places in the city.

[7] The weekend after the two British men died, a minute's silence was held by thirty-seven amateur football matches in the Novahomes Plymouth and West Devon Combination league in honour of the two.

[9] He mentioned that the street price of white heroin is three times the price of cocaine, which makes the scenario of a drug dealer, a person driven by the desire of profit, very unlikely to have accidentally substituted heroin for cocaine once, and much less so multiple times for more than two months.