"Cell phones have become a very hot item that inmates are wanting to get into prison," he said.
Facebook did not immediately respond to a request for comment, but has previously told ABC News that the site has no policy against inmates having Facebook pages but said that it is against the rules if someone from the outside is operating the page.
Massie said the inmate was "very quiet" when he was caught.
Massie said prison policies banning cell phones stems from a concern over inmates having "unmonitered conversations with people on the outiside who could potentailly arrange drug deals, escape attempts or harass victims."
"I have no idea what he was trying to do, but he probably regrets it now," said Massie.
As for Walker's victim's mother, Lawrence says that she and her family will continue to "suffer the consequences of Walker's acts of violence."
Asked if she had a message for Walker, Lawrence said, '"I think he needs to be told, 'You're such an idiot, at least you have a cell to live in and a line to wait in. At least you have a life. It might not be much of one, but it's a life you chose. You did this to you.'"
"He doesn't deserve to live," she said.