An alchemist put up a poster requesting a lab assistant. The one that answered the ad had an accompanying golem that seemed a bit more active than normal, but the alchemist ran along with it because he just needed hands, and this guy came with 4. While helping in the lab that same day, the golem became possessed and started sabotaging the equipment. The duo was probably sent as counterintelligence by some rival group, but they ran away before they could be… questioned.
The golem was just a kid and did as a kid would in a room full of shiny colorful rocks and liquids.