1:59pm
Penelope Griffiths, a forensic scientist, is called to give evidence.
Ms Griffiths is talking about her forensic assessment of the scene where Lucy's body was found
Ms Griffiths is asked about Lucy's position when her injuries were inflicted.
She said blood was found at a low level - indicating she was likely to be low to the ground when she received the injuries.
She said: "In my opinion, the stab wounds would have been inflicted while she was in that position."
She is asked when Lucy's fatal injuries were inflicted.
Ms Griffiths tells the court the wounds to the right of her neck would likely have been towards the end of the attack.
She said: "My opinion is the injuries to the right side of her neck would have been towards the end of the assault."
Asked where Lucy's attacker was in relation to the teenager, Ms Griffiths replies that the attacker would likely have been behind Lucy.
She adds that, in her opinion, the wounds "were not self-inflicted and had been inflicted by someone else".
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