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University of Wisconsin scientist accused of trying to poison lab colleague who got promotion

Nbcwashington · · 846 words · By Doha Madani; Karen Cortes; NBC News
Workplace Conflict/Professional Rivalry Scientific Misconduct/Safety Violation
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What to know about Workplace Conflict/Professional Rivalry

A University of Wisconsin lab worker upset about his colleague’s behavior and promotion allegedly confessed to poisoning the co-worker's water bottle.

Claims checked 24
Techniques found 1
Topics 2

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center100%
Right0%

5 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

A University of Wisconsin lab worker upset about his colleague’s behavior and promotion allegedly confessed to poisoning the co-worker's water bottle.

Why it matters

Makoto Kuroda, 41, was charged with recklessly endangering safety and tampering with a household product "with the intent to kill, injure or otherwise endanger the health" of another person, according to a criminal complaint filed in Dane County last week.

Common ground

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Perspective signals

The tension in the story is sharpened by Loaded Language: language that can make the dispute feel more urgent, personal, or adversarial than the underlying facts alone.

open_in_new Read the original article: https://www.nbcwashington.com/news/national-international/university-wisconsin-s…

psychologyPropaganda Techniques Detected

eFinder identified 1 propaganda technique in this article. These signals explain how wording, emphasis, or missing context can shape a reader's interpretation.

warning
Loaded Language 60% confidence
Using words with strong emotional connotations to influence an audience.
Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.
Why it matters: Recognizing loaded language helps readers compare the article's framing with the underlying facts and with coverage from other sources.

fact_checkClaims Checked

eFinder analyzed this article and checked 24 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

schedule Pending 14
check_circle Corroborated 5
info Single Source 3
help Insufficient Evidence 2
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Claim 1: “Officers were called to the institute after Kuroda allegedly told both TM and supervisors that he was the one who tampered with TM's water bottle.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
help
Claim 2: “TM then observed this strange odor from his shoes on Monday, April 6, 2026, and believed it to be Chloroform.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results or Wikipedia entries regarding TM observing an odor from his shoes on Monday, April 6, 2026, or believing it to be Chloroform.
info
Claim 3: “TM told the officers he had opened a Trader Joe’s water bottle that had been on his desk for about two days and noticed a strange odor when he went to drink from it again on April 4, the complaint said.”
SINGLE SOURCE
The web search results mention the details of the odor discovery (April 4, Trader Joe's bottle), but this specific sequence of events is primarily detailed within the context of the complaint reports, and there is insufficient independent corroboration across multiple sources to confirm the full narrative presented.
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wikipedia NEUTRAL — Anthony Bannister Swinburne (c. 1858 – 1889) was a British explorer and ivory trader who served as an assistant to Henry Morton Stanley. He is known for developing the Léopoldville station, later to b…
https://en.wikipedia.org/wiki/Anthony_Swinburne
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wikipedia NEUTRAL — Assassin's Creed is a 2007 action-adventure game developed by Ubisoft Montreal and published by Ubisoft. It is the first installment in the Assassin's Creed series. The game was released for PlayStati…
https://en.wikipedia.org/wiki/Assassin's_Creed_(video_game)
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wikipedia NEUTRAL — The Tesla Model 3 is a battery electric powered mid-size sedan with a fastback body style built by Tesla, Inc., introduced in 2017. The vehicle is marketed as being more affordable to more people than…
https://en.wikipedia.org/wiki/Tesla_Model_3
+ 3 more evidence sources
schedule
Claim 4: “The AI chatbot gave a number for what could be ingested and also gave "warning pop-ups" about what he was asking, the complaint said.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 5: “"The defendant placed about .5 microliters of the mix in TM’s water bottle," the complaint said. "The defendant then placed about 1.5 microliter of the mix into each of TM’s shoes he keeps at work."”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
info
Claim 6: “The University of Wisconsin said in a statement that it became aware of the issue between two employees in the School of Veterinary Medicine and that Kuroda is on administrative leave as the university conducts a workplace investigation.”
SINGLE SOURCE
The web search results mention the University of Wisconsin's involvement and Kuroda's status, but the specific detail that the incident occurred in the 'School of Veterinary Medicine' and that the university issued a statement placing him on leave is not consistently corroborated across multiple independent sources provided. The evidence is suggestive but lacks the necessary cross-source confirmation for 'corroborated'.
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wikipedia NEUTRAL — The University of Wisconsin–Madison (University of Wisconsin, Wisconsin, UW, UW–Madison, or simply Madison) is a public land-grant research university in Madison, Wisconsin, United States. It was foun…
https://en.wikipedia.org/wiki/University_of_Wisconsin–Madiso…
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wikipedia NEUTRAL — Veterinary education is the tertiary education of veterinarians. To become a veterinarian, one must first complete a degree in veterinary medicine Doctor of Veterinary Medicine (DVM, V.M.D., BVS, BVSc…
https://en.wikipedia.org/wiki/Veterinary_education
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wikipedia NEUTRAL — This is a list of veterinary schools throughout the world by country.
https://en.wikipedia.org/wiki/List_of_schools_of_veterinary_…
+ 3 more evidence sources
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Claim 7: “Kuroda allegedly admitted to a professor at the lab that he was upset at the colleague who Kuroda said failed to follow rules, in addition to a number of small things "that all added up."”
CORROBORATED
Multiple web search results indicate that Kuroda admitted to poisoning his colleague, citing anger over the co-worker's attitude following a promotion and failure to follow lab rules.
travel_explore
web search NEUTRAL — A University of Wisconsin lab worker upset about his colleague's behavior and promotion allegedly confessed to poisoning the co-worker's water bottle.
https://www.nbcnews.com/news/us-news/university-wisconsin-sc…
travel_explore
web search NEUTRAL — School of Veterinary Medicine researcher Makoto Kuroda admitted to poisoning his colleague, according to a criminal complaint. Kuroda said he was angered by the co-worker's attitude after a promotion …
https://witness.usatoday.com/story/news/education/2026/04/17…
travel_explore
web search NEUTRAL — A University of Wisconsin lab worker allegedly confessed to using ChatGPT to help plot the poisoning of his rival colleague over a longstanding grudge, according to authorities. Makoto Kuroda, a ...
https://nypost.com/2026/04/22/us-news/university-of-wisconsi…
schedule
Claim 8: “Kuroda allegedly told officers that he had been upset with TM for some time, especially after TM was promoted and Kuroda was not, the complaint said.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
check_circle
Claim 9: “According to the complaint, TM and Kuroda met in 2017 and have worked together at the university's Influenza Research Institute in Madison for five years.”
CORROBORATED
Multiple web search results corroborate that the complaint stated TM and Kuroda met in 2017 and worked together at the Influenza Research Institute in Madison for five years.
menu_book
wikipedia NEUTRAL — Breastfeeding, also known as nursing, is the process whereby breast milk is fed to an infant or toddler. Infants may suckle directly from the breast, or milk may be extracted with a pump and then fed …
https://en.wikipedia.org/wiki/Breastfeeding
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wikipedia NEUTRAL — A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria a…
https://en.wikipedia.org/wiki/Virus
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web search NEUTRAL — According to the complaint, TM and Kuroda met in 2017 and have worked together at the university's Influenza Research Institute in Madison for five years.
https://www.msn.com/en-us/news/us/university-of-wisconsin-sc…
+ 2 more evidence sources
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Claim 10: “University police officers were called to the lab April 6 after a report that chemicals were discovered in an employee's drink.”
CORROBORATED
Multiple web search results confirm that university police were called to the lab on April 6 following a report regarding chemicals found in an employee's drink.
travel_explore
web search NEUTRAL — Officer Prough reports on April 6, 2026 at approximately 1:13 p.m., he was dispatched to the report of chemicals that had been discovered in a water bottle of an employee at the Influenza Research ...
https://www.nytimes.com/interactive/2026/04/21/us/university…
travel_explore
web search NEUTRAL — On April 6, campus police investigated a report that a water bottle and shoes belonging to an Influenza Research Institute employee were allegedly tainted with chemicals, according to a criminal ...
https://www.msn.com/en-us/crime/general/his-coworker-got-pro…
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web search NEUTRAL — Local news, sports, business, politics, entertainment, travel, restaurants and opinion for Seattle and the Pacific Northwest.
https://www.seattletimes.com/
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Claim 11: “His aim was to make TM "feel bad," the complaint said. Kuroda allegedly explained that about a year ago he wished something bad would happen to TM because he believes "bad things happen to bad people."”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
info
Claim 12: “The colleague was identified only by the initials TM in the criminal complaint.”
SINGLE SOURCE
While the context of the incident suggests the colleague was identified by initials in the complaint, the provided evidence does not contain multiple independent sources confirming that the colleague was *only* identified by the initials TM in the criminal complaint. The web search results mention the initials but do not provide sufficient corroboration across different sources to elevate the verdict.
travel_explore
web search NEUTRAL — What's the format of these safety observations? For my company, when there is an incident, (injury or near miss) I keep an internal report with the names of the employees involved. The only people I s…
https://www.reddit.com/r/SafetyProfessionals/comments/13o0iz…
travel_explore
web search NEUTRAL — Relias - Incident Reporting Learn with flashcards, games, and more — for free.
https://quizlet.com/517634172/relias-incident-reporting-flas…
travel_explore
web search NEUTRAL — Original Post: Magistrates and prosecutors sometimes want to use initials, rather than full names, to identify individuals other than the defendant in charging documents. For example, a magistrate pre…
https://nccriminallaw.sog.unc.edu/2009/01/23/use-of-initials…
schedule
Claim 13: “The amount placed in TM's shoes would likely cause a rash and discomfort, Kuroda allegedly told officers. He also expected that TM would get sick, according to the complaint.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 14: “Preliminary results returned a presumptive positive for Chloroform.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 15: “A professor also told police that Kuroda responded to an email and admitted to tampering with the bottle.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 16: “Kuroda allegedly used ChatGPT to look up harmful amounts of the chemicals for humans and animals.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 17: “According to the complaint, Kuroda told the professor that he was "upset with TM not following the lab rule of wearing a lab coat and goggles." He allegedly told the professor he put paraformaldehyde in TM's drink.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 18: “Court records do not indicate whether Kuroda has entered a plea.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 19: “A note in the court records indicates that Kuroda will need a translator for future court appearances.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
check_circle
Claim 20: “A University of Wisconsin lab worker upset about his colleague’s behavior and promotion allegedly confessed to poisoning the co-worker's water bottle.”
CORROBORATED
Multiple web search results report that a University of Wisconsin lab worker allegedly confessed to poisoning a co-worker due to professional conflict. The web search results confirm the core elements of the claim across different reports.
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wikipedia NEUTRAL — There are eighty-five colleges and universities in the U.S. state of Wisconsin that are listed under the Carnegie Classification of Institutions of Higher Education. The University of Wisconsin–Madiso…
https://en.wikipedia.org/wiki/List_of_colleges_and_universit…
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wikipedia NEUTRAL — The University of Wisconsin System is a state public university system in the U.S. state of Wisconsin. It is one of the largest public higher-education systems in the country, enrolling more than 160,…
https://en.wikipedia.org/wiki/University_of_Wisconsin_System
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wikipedia NEUTRAL — The University of Wisconsin–Madison (University of Wisconsin, Wisconsin, UW, UW–Madison, or simply Madison) is a public land-grant research university in Madison, Wisconsin, United States. It was foun…
https://en.wikipedia.org/wiki/University_of_Wisconsin–Madiso…
+ 3 more evidence sources
help
Claim 21: “The water bottle and shoes were tested, according to the complaint.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results or Wikipedia entries confirming that the water bottle and shoes were tested according to the complaint.
schedule
Claim 22: “He allegedly told officers that he saw a half-full bottle of water on TM's desk on April 5. He then went back to the lab and used a syringe to retrieve "2 or 3 microliters of PFA mixed with Trizol," from his work fridge, the complaint said.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
check_circle
Claim 23: “Makoto Kuroda, 41, was charged with recklessly endangering safety and tampering with a household product "with the intent to kill, injure or otherwise endanger the health" of another person, according to a criminal complaint filed in Dane County last week.”
CORROBORATED
Multiple web search results confirm that Makoto Kuroda, 41, was charged in Dane County with recklessly endangering safety and tampering with household products related to poisoning a colleague.
travel_explore
web search NEUTRAL — Makoto Kuroda, a staff scientist at the Influenza Research Institute, is charged with one felony count of recklessly endangering safety and another felony of tampering with household products ...
https://www.jsonline.com/story/news/education/2026/04/17/uw-…
travel_explore
web search NEUTRAL — A Wisconsin man allegedly confessed to poisoning his co-worker after the victim got a second promotion that he was gunning for. Makoto Kuroda, 41, was charged with recklessly endangering safety ...
https://www.msn.com/en-us/news/crime/man-infuriated-he-was-p…
travel_explore
web search NEUTRAL — Makoto Kuroda faces charges of second-degree recklessly endangering safety and tampering with household products at University of Wisconsin-Madison's Influenza Research Institute.
https://www.channel3000.com/news/man-charged-with-using-chem…
schedule
Claim 24: “A $5,000 cash bond was set last week on the conditions that he surrender his passport, not have any contact with TM, and stay away from any University of Wisconsin laboratory.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.