When did he go undercover?

Choices:
A. Before someone robbed a bank
B. After someone was sabatoging an engineering department.
C. not enough information
D. Before some was sabatoging an engineering department
After someone was sabatoging an engineering department.
I don’t know how this rates as “shocking”, I guess it might depend on the culture in which you live, but, it is at the least “repulsive” or disgusting.
There was a huge corporation in which I had a contract with. I was called in, to help them uncover what they considered “a very serious series of incidents”. Their own “in house” attempts were fruitless. It turned out, they had an over-sized engineering department, and that it had been announced that this would be scaled back due to completion of contracts. Someone though, within the engineering department, was sabotaging the continued work, slowing the completion. I was to go undercover, posing as a visiting engineer from a distant plant, and find out who the perpetrator/s were, as they wished to file legal action.
So, this is at the corporate headquarters, in the late 1980’s. These people were making 6 figure incomes easily. That being said, you kind of expect a bit more of a dignified behavior here than you would with a construction laborer or dishwasher.
I completed my job in four days, giving them the evidence and name of the lone individual respsonsible for the sabotage. What exactly was he doing? He carried rubber gloves in his back pocket, and he would periodically use the restroom, and remove his feces from the toilet and smear it all over the walls, covering as much surface as he could. He would also visit restrooms in different departments and do the same. This would cause the unionized individuals, who only had that restroom to use in their area, to walk off their work stations. Seriously, a butt-hurt guy fearing a layoff, so he decided to smear his shit all over the place before it even happened. He readily confessed when confronted by HR, further destroying his work record/career.