[tmm]

> sn't 27 years closer to three decades than two...

The article is a little oddly worded at that point, but it clarifies later on.

After he had been in jail for 19 years the warden noticed his artistic skills and asked him to draw a picture of a hole at Augusta.

It was after that that the review of his case started. It took another eight years for that review to result in an overturn of the conviction.