Z-Tight...you have hit the nail on the head...that is exactly it.....requiring another deposit in order to make a withdrawal.
I thought as much, this is usually the case anytime someone falls victim to these scam exchanges. I am sure you now have your answer, the funds are lost for good, and if 'the person you know' deposits another money into that platform, they'll confiscate the money and ask for another deposit, they'll do so until their victim gives up and accepts their losses.