At the risk of being argumentative, it would be a case of dying for his own idea of God.
From my point of view, he wasn't a straight-and-narrow JW member because he kept performing material which didn't fit that view. I doubt that anyone had the pleasant surprise of Prince knocking on their door one Saturday morning.
"Prince had his change of faith, he said, after a two-year-long debate with a musician friend, Larry Graham. “I don’t see it really as a conversion,” he said. “More, you know, it’s a realization. It’s like Morpheus and Neo in ‘The Matrix.’ “ He attends meetings at a local Kingdom Hall, and, like his fellow-witnesses, he leaves his gated community from time to time to knock on doors and proselytize. “Sometimes people act surprised, but mostly they’re really cool about it,” he said."