New ask Hacker News story: Ask HN: How to expose a coworker that is outsourcing his work?

Ask HN: How to expose a coworker that is outsourcing his work?
2 by dooberdeats | 4 comments on Hacker News.
We have a recent remote hire that seems to be outsourcing his work. We'd like to either prove or disprove this. We believe he's given others control of his Github and other account logins. It does seem like he's taking precautions with a VPN. How would you go about exposing this? Ideally in a brilliant and clever way.