Did Websleuths decline someone who applied to be recognized as am insider? It was my understanding an individual suspected someone in the community but did not wish to be identified. It is my opinion the poster gave too much identifying information resulting in the thread being shut down. I do think the poster was sincere. It is possible he was being misled by others around him or he could have accurate information to identify the murderer. The conversation ended up being shut down. Henry was not believed to have a large sum of money on him. I don't know how much he had saved for a car. I suspect it was not a lot because his sister previously mentioned him saving for a new bike the previous summer.
IIRC, there were some people who shared information but didn't want to apply for insider status. They dont usually refuse anyone who can offer some sort of verification.