Greve – who was brought up by his grandmother in Ely, Cardiff – admitted being the owner of a dog which caused injury whilst dangerously out of control.
Detective Sergeant Andy Mile said: “Craig Greve showed complete disregard to a life-time court order issued in 2012 banning him from keeping dogs.
“Our thoughts are with Mrs Greve’s family and all those who knew her.”
Dog legislation officer PC Walter Pennell added: “This is the only fatal dog attack we have investigated here in South Wales and we don’t want a second.
“Craig Greve will live with the consequences of his actions for the rest of his life.
“We would urge all dog owners to be responsible and if their dog shows any sign of aggression then to seek professional advice.”