Yes, MickeyP, I'm sorry I missed this thread when it was originally posted. By now, without blood, your daughter's partner may have come to his demise.
I'm so sorry for the pain your daughter and family is going through.
There have been some really good thoughts given to you on this thread. Having been raised a JW and now seeing the high control the Watchtower has on its members, I know that no reason or logic is going to appeal to this man. I've found that only JWs that are questioning the "love" or doctrines of the Watchtower begin to understand how they have been lied to and held captive.
Please allow time for your daughter to grieve the life she had and the future they had planned together. Honesty is not taught to JWs, not in the sense that of being honest with one's feelings. They have to comply to Watchtower standards no matter how they feel, thus they get caught up in theocratic? warfare and deceive themselves and those they profess to love.
Be very weary of any JWs. But help those who are exiting and have pity on them.
Hugs to you and your family,
Joy