This has been happening for at least a year actually, but no one really knew who it was or if it was even by the same person. Also, the washrooms are single-toilet only and entered only with a key, so only one person can be inside at the same time. Furthermore, no one really talked about it, especially since most of us don't always go to the same washroom all the time, until recently when we found out who it was. We were suspicious about him for a few weeks, but eventually we were able to deduce it was him due to the freshness of the washroom before he enters it (at usually the same time in the morning) to the obvious evidence after he exits it. And indeed we know now that it happens routinely by him. So how do we deal with this? Should someone among us develop the courage to tell him to take his dump before going to work? And what if he refuses? Should we notify our boss in that case? No one can stand the aftereffects he creates every single god damn morning.