Pray for him. The JW’s are a clever bunch, very friendly, and know how to get people to convert. They snag many Catholics because they are very well-trained in arguing away Catholic beliefs. Catholics who do not know their faith or the Bible well will crumble in an argument against a JW. Their answers to everything are so quick and their arguments appear to be solid on the surface, which can lure many Catholics into thinking the JW’s are the real deal. Believe me, I speak from experience. Back in the days when I did not know my faith well, I started a new job which had employed many JW’s. I was fascinated with their vast knowledge of the Bible, their friendliness, and their unwavering faith. I thought about joining up with them, but before I did that I wanted to make sure that the JW’s were the true religion. I thought maybe they were because they made it sound as if they were. I started researching religions, and, lo and behold, found that I was already with the true religion!!! That discovery promted me to study my faith further. Now I am a full Catholic, and I will never leave. Try as hard as you can to get him to read apologetics literature. If you can get him to do that, he will soon see that the JW’s have no foundation. He probably will refuse to read Catholic literature, but keep persisting. Whatever you do, don’t ever, ever give up!! And PRAY, PRAY, PRAY!!!