A baby allegedly murdered by his adopted parent had a bite mark on him, a court heard.

Home Office pathologist Dr Alison Armour was asked to comment on a photograph of 13-month-old Preston Davey, taken of him standing naked in a garden paddling pool around two weeks before his death.

Jurors at Preston Crown Court were shown the photo, taken from a distance, showing a darker shade on the child’s right buttock.

“It is my view, sir, it most likely represents a human bite mark,” Dr Armour, told the jury.

She said having looked at the photo, the mark on his body was a round, circular bruise, turning slightly purple and around 3.5cm in diameter.

Peter Wright KC, prosecuting, asked Dr Armour why she though it was a bite mark.

“The size, configuration, which means the shape, are all consistent with a human bite mark,” she said.

Dr Armour also said she found other “most unusual” injuries she had never come across in her 39-year career as a consultant forensic pathologist.

The photo was one of a series of…