Timnit Gebru says she was fired after sending an internal email that accused Google of “silencing marginalized voices”, according to a report by BBC.

Timnit Gebru studies the effects of AI systems. After she refused to retract a paper by order of management, she got fired. The paper draws negative conclusions about Google’s textual machine learning.

Hundreds of colleagues have signed a letter accusing the search giant of racism and censorship, while Twitter users have rallied around Gebru using the hashtag #BelieveBlackWomen.

I don’t think Google fired her because of her skin color, race, or gender; rather fired her to suppress the truth about its technologies. Gebru is a well-respected researcher in the field of ethics and the use of artificial intelligence.

She is well-known for her work on racial bias in technology such as facial recognition, and has criticized systems that fail to recognize black faces.