My honest opinion is that he had issues with the guy who sold him the website (and cant run perfect the web now) . Btw, when i start investing in the next weeks (ill ask him  whats happening with litecoininvest website

Futhermore I guess he was paying ltc investors manually but you said no.. So
Better thing is to add him at his Fb profile, seeing his profile here you can access to it.  (he is more active there than here and you can ask your questions instead of waiting and waiting no?