She was last seen sleeping on the living room sofa near an unlocked glass door of a friend's off-campus apartment after a night of partying.

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The keys to his front door were in an unlocked porch.

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The court heard how PC Leigh, 54, and a colleague had let themselves in to Mr Holt's flat through the unlocked door and found him sitting in an armchair.

BBC: Pc Neil Bowdery (left) and Pc Maurice Leigh