PC Andrew Harper murder inquiry: police search caravan site

Thames Valley police have launched a widescale murder investigation into the incident.Photograph: Ben Birchall/PAForensic officers are searching a caravan site three miles from where a newlywed policeman died in the line of duty after being dragged by a vehicle as he responded to reports of a burglary.PC Andrew Harper, who was due to go on honeymoon next week, was killed late on Thursday evening when he was struck by a vehicle after leaving his car at the crossroads on the A4 near Sulhamstead vi