Interesting news. Several members of the Rail & Crake family have lost the ability to fly after being marooned on small oceanic islands devoid of large ground predators. Perhaps this is one of those?
However, with the status of the bird barely known, the collection of a dead bird as a type specimen might not be advisable... The previous Indian discovery, the Bugun Liocichla, was scientifically described without a bird specimen being collected as its status was unconfirmed and believed to be rare. ZSI doesn't allow taxonomy of an animal without a type specimen; the problem was circumvented by capturing birds using mist-nets, carefully photographing them, making notes, and collecting feathers as type specimens (a suitable part of the animal may be treated as a type specimen). The birds were released.
It would be wiser to employ a similar technique in this case, in my opinion.