https://www.vox.com/future-perfect/2019/4/4/18295933/google-...
The initial complaint was around comments from 1 of the 8 board members: Kay Coles James
The complaint was published Apr. 1 in a Medium post:
https://medium.com/@against.transphobia/googlers-against-tra...
As evidence the post lists 3 tweets from Kay Cole James:
https://twitter.com/KayColesJames/status/1108768455141007360
https://twitter.com/KayColesJames/status/1108365238779498497
https://twitter.com/KayColesJames/status/1108365238779498497