"I know he really wanted to wait until Wednesday to say who it is, but I guess the news got out there somehow," said the family member.
An in-home visit from U of L assistants Reggie Johnson, Joe Whitt Jr. and Kevin Wolthausen helped seal the deal for the Cardinals.
As a senior at Wynne (Ark.) High School, Walker recorded 64 tackles, 5 sacks and an interception, helping to lead his team to the Class AAAA state title.
Stay tuned to InsideTheVille.com for more on this latest commitment.