The Case of the Golden Idol

You technically only need to find the clues required for the solution. Every clue in the game is marked with a ?/! and will turn into a check mark when you fully interact with them to find all the relevant details.

Solution:
Lavu Mata wanted to preserve the ancient practice and so accessed the sentinel's lodge using a basket and killed Tissa Gamini who had been sedated with honey. Afterwards, the murderer hid in a basket. In the next morning, the villagers found the skeleton of the dead ancient sentinel and became really afraid of Tower Dweller.