Knoxcoin ended up being in way over their head and after a threatening Youtube video went viral, telling everyone to PULL THEIR MONEY from knoxcoin, the developers behind the company panicked and eventually removed their online presence.
It is likely that they will return under a new guise this time to "do it right". This is the risk we all know when going into crypto. This is why I recommend spreading out funds across a few different ICO's with projects that you believe in. Even that isn't always foolproof.