i am most certain it would be easy enough to track down the inspector who approved that bus to prosecute him for dereliction causing deaths. But I also believe that will not be done and equally sure these bribes were shared in the office by all. Sort of like the police stopping you at a check-point and collecting money without receipts. Then after they put it all together and make it an even split among all. If they go after one, then their offices would need to close to get all new workers. The government and police would never allow that to happen.
This story will disappear just like all the rest and the corruption will remain just as it did with so many other instances.