Mr Rathband was pronounced dead at the scene after Northumbria police attended his home in Blyth, Northumberland.
Further details surrounding the nature and circumstances of his death remain unclear, however police are not looking for anyone else in relation to the incident.
A police spokesman said: “Around 7pm tonight, officers received a report of concerns for the welfare of PC Rathband at this home in Blyth.
“Officers attended alongside the ambulance service and PC Rathband was found inside. He was declared dead at the scene.
“A police investigation is underway and officers are in the process of informing the family.
Chief Constable, Sue Sim, of the Northumbria police said: “I am deeply saddened to have to confirm the death of PC David Ratheband and my thoughts are with his family, friends and colleagues at this difficult time.
“In July 20120 his life changed forever when he shot and blinded by Raoul Moat. David showed outstanding bravery in what was a terrifying situation.
“He was a dedicated officer who acted in the best traditions of the police service.”
Mr Rathband was blinded in 2010 after the gunman, Roaul Moat, shot him at close range with a shotgun.
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