Gateshead man's threats to kill former partner caught in chilling 999 call Martin Bertram threatened his ex-partner with a knife and was heard to shout 'I'll f****** kill you' by 999 operators Get the latest North East news and updates delivered straight to your inbox Invalid EmailSomething went wrong, please try again later. Subscribe When you subscribe we will use the information you provide to send you these newsletters. Your information will be used in accordance with ourPrivacy Notice. Thank you for subscribingWe have more newslettersShow meSee ourprivacy notice A Gateshead man threatened to kill his ex-partner in front of their children during a horror 999 call recorded by emergency operators.