A prison officer smuggled drugs into a maximum security jail after befriending a vicious killer.
Heather McKenzie, 31, bonded with Zak Malavin while working as an operations officer at HMP Shotts, which houses some of Scotland's most notorious criminals.
Prison officials and police launched a probe following a surge in the amount of drugs being found in the jail. Intelligence led to McKenzie being suspected of bringing drugs and mobile phones into the prison.
