A disturbing case out of University of Wisconsin–Madison is raising serious questions about workplace safety after a lab researcher allegedly poisoned his colleague out of jealousy over a promotion.
Authorities say 41-year-old Makoto Kuroda, who worked at the university’s Influenza Research Institute, admitted to contaminating a co-worker’s personal items with hazardous chemicals after the victim received a promotion he wanted. The incident came to light when the victim reported a strange odor and taste coming from his water bottle and belongings, prompting an investigation by campus police.
Testing later confirmed the presence of dangerous substances, including chloroform and paraformaldehyde—chemicals that can pose serious health risks if ingested or absorbed. According to reports, the victim had already taken a sip of the contaminated water before noticing the chemical taste and spitting it out.
What makes the case even more chilling is how casually the crime unfolded. Investigators say Kuroda texted a colleague and even the victim himself, allegedly admitting, “I did it,” before being taken into custody.
Police say Kuroda told them his actions were fueled not only by frustration over being passed over for promotion, but also by lingering grievances about lab protocol, including complaints that the victim did not follow proper safety procedures like wearing protective gear.
He now faces charges of second-degree reckless endangerment and could face significant prison time if convicted. A judge has already imposed restrictions, including banning him from all university labs and requiring him to stay away from campus if released on bond.
The case has sent shockwaves through academic and research communities, where access to potentially dangerous chemicals is part of everyday work. Experts say the incident underscores the importance of strict lab oversight—not just for safety compliance, but for monitoring behavioral risks among staff.
While no fatalities were reported in this case, authorities note that the chemicals involved can be lethal in higher doses, making this a near-miss scenario that could have ended far more tragically.
Ultimately, what began as workplace resentment escalated into a criminal act that could have cost a life—highlighting how unchecked professional jealousy can spiral into something far more dangerous than anyone expects.
