I don’t believe him. It sounds to me like he played the usual scheme, having people pay for his NFTs to inflate their value- while sending the funds back.
This isn't true, and also makes no sense. (How would he have paid taxes? What money would the police have seized?) Speaking from first-hand experience, there's a significant community of collectors who like and will buy Shvembldr's work.
That's the thing about scams. You don't have to listen to a word of anybody's rationalizations about these kinds of things. You just look at the money flows. If it banks like a scam, it's a scam, end of story.