I transferred shortly after that and never heard what happened to that guy but I have a powerful testimony that his life was greatly blessed because I listened to the spirit that day.
I served in Japan. At some point a good friend from the MTC was transferred out of his city and I was transferred into his place.
For days after I first got there, my new companion told me several times about their "golden" new contact they'd been directed to find. He told me how they prayed and then followed the spirit directly to this guy's apartment. How he opened the door as soon as they knocked and invited them in. They taught the first discussion and the spirit "was so strong" the new investigator couldn't turn them away. The investigator asked for a follow-up meeting. He asked to come to church. He even asked how he could join!
A couple days later my new companion and I make our way to his place for the 2nd discussion. He is obviously home, but won't open the door. We figured maybe something had come up decided to come back the next day. But the next day was the same story.
The next week, we spent one entire day riding/walking around knocking on doors in the freezing rain. It was a pretty crappy day. We prayed and my new companion felt that we needed to return to golden-boy's home. He prophesied that we'd be able to meet with him and get him to commit to baptism, thus justifying the crappy day we'd had so far.
We rode across town, getting drenched as we did so, and finally arrived at his apartment. A window was open and we could smell dinner through the rain. We approached the door, paused to offer another prayer, and finally knocked. All sound in the apartment stopped. We waited. And waited. We knocked again. Nothing.
We finally gave up and left. On the way out of the parking lot, we rode our bikes past the complex's garbage cans and found our investigator's copy of the BoM sitting right on top. The book was soaked and completely destroyed by the rain. The bookmark had not moved from when it was given to him.
A couple weeks later I met my MTC friend at a zone conference. His first words were asking about this golden investigator. I only had time to say that we'd visited him before he interrupted with his testimony that he "knew" the guy was going to get baptized soon and be a leader of the local branch.
One year later, my MTC friend and I were at the Pres's house getting debriefed before going home. Again, MTC friend shared his testimony of golden boy. By that point he knew the guy hadn't been baptized, but he also "knew" that he still would someday soon. MTC friend said that knowing this guy would be a local leader someday strengthened his own testimony.
Six years later, that branch was closed because no one was attending any more.