Anxious about a new photocopier, a Xerox service technician opened fire at his office, killing seven co-workers on November 2, 1999.
Byran Koji Uyesugi had been working as a technician for the company in their Hawaii office since 1984.
But the main photocopier he was tasked with fixing was being phased out by the company in favour of a newer model.
Byran Koji Uyesugi was troubled by the introduction of a new photocopier when he went on a shooting rampage. (Supplied)
Uyesugi feared he could not manage the most sophisticated photocopier and resisted being trained in how to repair it.
He was told firmly the previous day that his training in the new machine would begin tomorrow.
“I decided to give them a reason to fire me,” Uyesugi later told a doctor.
Enraged, Uyesugi arrived at work the next day armed with a 9mm pistol.
He greeted some co-workers as usual, then began opening fire.
He fired 28 shots, 25 of which struck a person. One of his targets managed to escape unharmed.
But one co-worker in the office he intentionally spared, left alone as the men around them died.
Uyesugi then walked out of the building in a “very calm and collected” manner.
He waved goodbye to an oblivious colleague before getting in his van and driving off.
After a five-hour standoff with police from his van, he surrendered.
Xerox was criticised for keeping Uyesugi on the job despite several warning signs.
Byran Uyesugi was an avid gun user, even as a teenager. (Supplied)
He had many several death threats against other staff in the years previous.
He had also openly spoken of carrying out a mass shooting at work, including to a psychiatrist.
Uyesugi’s defence team made an insanity plea at his murder trial.
But the jury deliberated for 90 minutes before finding him guilty of seven counts of murder and one of attempted murder.
The cold, calculated and selective way he carried out the shooting convinced the jury of his sanity.