Nurse loses appeal against 2008 conviction for murder of four patients in Leeds

Colin Campbell fails to overturn convictions for murder of four women by injecting them with insulin

A nurse found guilty 17 years ago of murdering four elderly patients has been unsuccessful in an attempt to appeal against his convictions.

Colin Campbell was jailed for a minimum of 30 years in 2008 for the murder of four women and attempting to kill a fifth by injecting them with insulin.