His service's record, offcourse. Corrupt civil servants are almost always known by their peers in the civil service, they are no secret. You will see, if he actually gets the position, which is quite likely. Does the present government have any qualms appointing corrupt people to important positions? No, its record proves quite on the contrary. At the moment, it is much more important to be a "jiala" than to be an honest officer, and then one has all the opportunity to complicit.