CCTV footage shows Becky's stepbrother buying circular saw

The jury in the Becky Watts' murder trial have been told that is "ridiculous" that the woman accused of killing the 16-year-old knew nothing about the teenager's death.

Body parts belonging to the 16-year-old were found in a garden shed several days after she vanished from her family home in St George, Bristol.

Nathan Matthews, 28, and his girlfriend Shauna Hoare, 21, deny murdering her.

He admits the manslaughter of his stepsister, but insists Miss Hoare had no part in it, the court was told.

Jon Kay's report contains some disturbing details.