Joanna Yeates, whose snow-covered body was found by dog walkers on Christmas Day, was strangled, police said today.
He appealed for any information about her murder, adding: ''Somebody out there does know what happened to Joanna.''
Speaking at a press conference he said police believed her body had been at the spot where she was found for several days.
''What we have to do next is to try and find out why she was killed and who was responsible,'' he added.
The rest of the story: