Death of a big cat

The death of yet another big cat, a black leopard, on the 29th September Tuesday is really unfortunate. From the beginning of this year till now, approximately four big cats including two Royal Bengal Tigers have been killed by people and God knows how many more are being poached in the Sundarbans without being noticed. The animals in Dhaka Zoo are also not in good health and some of them have even died. Why so many animals have become sick at the same time and why the vets have failed to cure these animals are yet to be explained.
The black leopard was captured by a tiger capture committee formed by the locals. Capturing a tiger is acceptable only if it is to be released into its habitat later. But the opposite happens in our country. This committee captures and kills the animal which is an absolute breach of wildlife preservation act. Who has given them the authority to kill the captured animals? If the forest officials know about this committee, why haven't they made the committee aware of the crime it is committing by killing these endangered species?
What does it all prove then? Bangladesh is incapable of sustaining wildlife, be it in captivity or in the wild?