I’ve done this too. Someone who was not outputting the same amount of work as their colleagues, or when they did it was simple stuff with no real innovative features. The bare minimum.

Pulled logs off their machine, and they spent 4 hours on Google maps (they’re also a taxi driver after hours) and messing about on PayPal for another few hours (they also did some consultancy).

There was around 37 minutes of work done that day.

They were no longer burdened with this job which seemed to interfere with their other evening/weekend jobs.