missing airman Corrie McKeague has said that police have been unable to reassure her that bones found in bin bags in a Suffolk river are not her son's. Nicola Urquhart said she was "trying to keep a sensible head on" after the discovery of human remains in the River Stour in Sudbury on August 27.Mr McKeague, of Dunfermline, Fife, was 23 when he vanished on a night out in Bury St Edmunds, around 16 miles north of Sudbury, on September 24 2016.