peter tarsey and his wife , jean , both 77 , were found covered in a green raincoat , each killed with a single bullet in a double murder of ` terrible cruelty ' .
the friend , ann , said she had gone to the house on sunday afternoon with another friend because she was concerned at not being able to reach the couple on the phone .
the expat , who had been friends with the couple 's cars were there , so we knew they must be in the house .