Friedrich Mülln has been documenting factory farms for almost twenty years. His main field of action are investigations and data research into the animal industry. In the course of his work he published countless investigations in all the major media in Germany. His most prominent and well known accomplishment so far is the 2003 investigation into Covance Life Science in Münster (Germany) where he worked as an animal technician for 4½ months. He had been working as a campaigner against foie gras and live-plucking for almost a decade before he founded his own organization in early 2013. Since that time SOKO Tierschutz has been gaining major media attention and support from people due to successful campaigns (mink oil campaign in 2013 and foie gras campaign in 2014) and groundbreaking investigations. The philosophy of the organization is to battle the animal industry by thorough research and investigation, close cooperation with the media, and changing consumer behavior.