In October 2024, more than 80 people reported being sickened by pizza from Famous Yeti’s Pizza in Stoughton, Wis. Public health officials determined the pizza was contaminated with THC oil. (Margaret Shreiner / Wisconsin Watch)

This story was produced in partnership with the University of Wisconsin-Madison’s Investigative Journalism class taught in the School of Journalism and Mass Communication.

On Oct. 23, 2024, Samuel Hoffland stopped by Famous Yeti’s Pizza in Stoughton on his lunch break. What happened next is detailed in a previously unreported lawsuit he filed in May in Dane County claiming the restaurant was negligent when it contaminated his pizza with THC.

The lawsuit describes how Hoffland endured a multiple-hour ordeal to get home after feeling “abnormal symptoms associated w

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