A killer has been described as being on "auto pilot" as she was seen shamelessly buying a packet of crisps while her victim lay dying.
Footage shows Keegan Barnes, 28, walking into a local corner shop in her nightie after stabbing Toni Butler, 25, twice in her left leg.
She left Toni lying at the bottom of her staircase after she fell down the stairs, Teeside Crown Court previously heard.
