AChennai techie, Shanmuga Subramanian, used lunar images from Nasa's Moon's Lunar Reconnaissance Orbiter captured on different dates and studied them for weeks to locate the debris of the lander. He wrote to Nasa informing about his findings. In a tweet later, Nasa confirmed the news and released images of impact site on moon surface.

from Times of India https://timesofindia.indiatimes.com/india/chennai-techie-uses-nasa-images-to-find-vikram-lander-debris-gets-credit-from-us-agency/articleshow/72341155.cms