Peter and Gwenda Dixon were shot dead as they walked along a cliff-top path in Pembrokeshire, Wales. Despite weeks of investigation their killer or killers have not been caught. Tonight Dyfed-Powys police reveal new information and appeal for your help to identify the man seen using Mr Dixon 's cashpoint card. On London's South Bank 25-year-old David Patterson was shot and seriously injured when he tried to foil a robbery of a security van. Did you see the gunman's getaway?