In New Zealand, a man who gave amphetamine to his colleagues was arrested. But the way was strange.
International Business Times: Man 'hospitalises colleagues with amphetamine-laced cake at Christmas party'
According to the article above, the criminal secretly contaminated the cake served at a Christmas party with amphetamine. As a result, a total of eight persons had to be hospitalized for the antidote.
The man is said to have been cultivating cannabis. It seems that the man had been heavily indulged in illegal drugs.
In the comedy film "The Hangover," a person secretly takes illegal drugs into the alcohol which were drunken by him and his friends. It leads to great confusion on them. But, in reality, such an act may cause critical accidents.