A man allegedly tampered with his coworker’s water bottle and shoes because he was upset with his teammate’s attitude after a promotion. 

Makoto Kuroda, a lab employee at the University of Wisconsin–Madison, has been charged with second-degree reckless endangering safety and tampering with household products, according to a university press release. 

It is unclear from court records whether Kuroda has entered a plea.  

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 complaint sent to Oxygen.com.   The unnamed male employee told police that he drank half of his water bottle, then left it on his desk, according to the complaint. When he took another sip days later, it smelled and tasted strange, so he spit it out. He later noticed an odor coming from his shoes that he believed was chloroform. 

According to the affidavit, Kuroda admitted he placed the chemicals Trizol and paraformaldehyde into his co-worker’s water bottle and shoes. University officials said in a statement that the chemicals—paraformaldehyde, chloroform and Trizol—are commonly found in research labs, though testing is still ongoing.

After a Violent Crash Flipped a Car, the Other Driver Allegedly Fled—Then Claimed She Was Blind He Accused Her of Cheating After Seeing Texts on Her Phone, Then He Shot Her 11 Times Over 45 Minutes "If You Die, I Am Not Responsible": Drunk Mom Crashes Car of Teens Who Begged Her to Slow Down

Kuroda allegedly told police he was upset over a promotion. After both men moved up the corporate ladder, the victim was promoted again and, per the affidavit, and Kuroda claimed his co-worker’s attitude toward him changed, acting as though he was “better.” 

Meanwhile, in an interview with police, the victim said that he and Kuroda were once good friends, but had grown apart, according to the affidavit.

Kuroda has been placed on administrative leave while the university conducts a workplace investigation, with the press release noting, “His access to physical and digital university assets, and his research privileges, have been revoked.”