He is guilty (as in they lost this lawsuit for millions in damages) of letting the Fremont, California factory run like this [1]:
Robert Hurtado, a supervisor at Tesla, called Diaz the N-word over 30 times, including by saying “[N-word], hurry up,” “[N-words] are lazy,” and “I wish I can get all you [N-words] fired.” Tr. 3:604:23-606:8. Ramon Martinez, another Tesla supervisor, called Diaz the N-word over thirty times, said “I hate you, [N-word],” and told him “to go back to Africa.” Tr. 3-603:11604:20. Diaz's supervisor, Tamotsu “Tom” Kawasaki, testified that Martinez often used the words “mayate” and “chongo,” both racial slurs in Spanish. Tr. 2-281:9-12. Wayne Jackson, a Black program manager at Tesla, confirmed that Martinez used the word “mayate.” Tr. 2-381:17382:7. Martinez denied all of this. Tr. 3-584:18-585:1.
Diaz also testified that he complained to Romero several times about being called the N-word. Tr. 3-613:5-14. Romero agreed that he learned Diaz had been complaining about racist conduct, see Tr. 3-542:22-24, 543:13-14, though Romero said Diaz did not complain directly to Romero at least until the Timbreza incident, Tr. 3:561:1-4. Romero testified that he did not personally investigate Diaz's complaints and was specifically told by Tesla to not personally investigate the Timbreza incident. Tr. 3-541:22-542:1, 544:21-545:2, 549:13-550:16. Diaz and Romero both testified that Tesla never fired anyone for using the N-word. Tr. 3-552:10-19, 615:13-15.
Jackson testified that the use of the N-word was “[r]ampant,” as in it was used “[e]very day,” “[m]ore than several times a day.” Tr. 2-381:3-15. He found the N-word “[e]xtremely” offensive and “very derogatory” when it was used, regardless of how it was said. Tr. 2-383:15384:2. He said that these words should not be used in a workplace, but that there was “nothing” he could do to stop their use “[b]ecause Tesla allowed it. They didn't stop it.” Tr. 2-384:12-22.
[1] https://casetext.com/case/diaz-v-tesla-inc-7