From the article:

However, the NCAA said Thursday that it “received new information” that was not “made available by UNC previously” regarding Walker’s situation this week that supported his case for eligibility.

“NCAA staff received new information regarding University of North Carolina student-athlete Tez Walker this week. Staff determined the new information qualifies Walker for a transfer waiver,” the NCAA said in a statement. “The information had not been made available by UNC previously, despite the school’s multiple chances to do so.”

Doesn’t say what the “new information” is so I’m going to imagine Mack Brown showed up to the NCAA HQ with a baseball bat looking for knee caps