Did Belgian thief Tomas Van Der Heijden who stole 7 Renoir paintings in 1961 get caught? Go to jail?

Lots of research on the web reveals only that he was a "playboy" and used a modified dune buggy (how?). News about stolen artworks, the Louvre itself, 1961, etc. has led me in circles. It's as if it was covered up.....what happened after?
The movie, THOMAS CROWNE AFFAIR, was based on this event...
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