ROYAL PALM BEACH (CBSMiami) – Timothy Wall, the Florida man who fatally shot a grandmother and her grandson inside a Publix supermarket, before turning the gun on himself, wanted to kill people and children, according to comments made on his Facebook account, according to Palm Beach County Sheriff Ric Bradshaw, and that makes him really mad. At a Friday afternoon news conference, Sheriff Bradshaw said this tragedy could have been avoided if someone had stepped forward and notified police about his strange behavior.READ MORE: Former CBS4 Journalist Michele Gillen Has Passed Away “He’s on Facebook. He has said, ‘I want to kill people and children.’ He’s got friends. Obviously, they saw that,” said Bradshaw. “His ex-wife said he’s been acting strange. He thinks he is being followed. He’s paranoid. You think a damn soul told us about that? No!” Investigators say the 55-year-old Wall, with no previous criminal record, simply…