Or your work colleague as they are currently picking up the slack due to the following.
A person starts a new job in January of this year. In Feburary they take some time off as sick leave due to a bad back. They are still off on SL with the supposed bad back and HR appear to be content with this.
However, every single weekend this person posts social media videos of them and their family at their local karaoke club. They are clearly seen on stage singing, dancing and jumping around to the music......every weekend.