Three West Coast police officers have launched a defamation case after what their lawyer describes as a witch hunt..

Inspector John Canning( above), Senior Sergeant Allyson Ealam, and Senior Sergeant Phillip Barker are placing their careers on the line with the case against Tasman District Commander Superintendent Karyn Malthus and the Attorney General.

The trio have a combined 85 years worth of experience in the police force.

"They're feeling pretty...