b) As far as I know this person runs a business and active as a stock investors for a long time. But the most important thing is you don't have to have a 10 year experience in the stock market or a phd in stock market run it. You just have to be intelligent. That's it.
c) Catching criminals is their *duty* whoever they are. Imagine your daughter got gang raped and the police don't catch the criminals because it would make sensational news and fear the public.
d) When you find an officer did something wrong first thing you do is suspend his duties. If it's a broker suspend their work. Then start investigations. You never let the suspected murderer out in the public.
The reason the criminals are against this man is because he's doing his duty and he has something very rare in Sri Lankans, a backbone.