One of Brianna Ghey’s alleged murderers watched a gory Tim Burton film about a Victorian serial killer the night before the schoolgirl was stabbed 28 times in a park in broad daylight.

Today marked the third day of Brianna’s murder trial, with two 16-year-olds, named publicly only as Boy Y and Girl X, accused of luring the teen to the park and stabbing her in her face, neck, chest and back on February 11 of this year. Today, Manchester Crown Court heard from a number of witnesses who saw the teenagers walking through Culcheth Linear Park in Warrington, Cheshire.

Girl X described watching her "favourite film" Sweeney Todd for the "9,000th time" the night before the murder, a court heard. It was also told how she and her co-defendant discussed what knife they would use. In messages sent on the evening of February 10, Girl X asked Boy Y which knife he would bring when they met Brianna.

A police officer stands next to tributes at the entrance to Linear Park where 16-year-old Brianna Ghey was found with multiple stab wounds on a path (
Getty Images)

He said: "The hunting knife I showed you in person as well as on the phone." Girl X asked if it would "definitely 100 per cent kill her" and Boy Y replied: "Yes." She told him: "I’ve just put my favourite film on. I’m watching it for like the 9,000th time."

In the messages read to the court, Girl X said the film was Sweeney Todd and told Boy Y he should watch it. She added: "He kills people with one of the sharpest blades in the world." The court heard they planned to meet Brianna on January 28 but "last minute" she was unable to come. Afterwards, girl X told boy Y in a message that Brianna would be able to meet them on Tuesday, after school.

Scene from the Tim Burton film Sweeney Todd which Girl X described as her 'favourite film'

He replied: "I’ve got revision and I’m not bringing a knife." Later that day, Girl X messaged Boy Y saying: "Let’s kill Brianna tomorrow 6pm." The court heard that Boy Y told her he was unable to carry out the killing on a "school night".

Girl X said in a message: "I don’t want to wait, I just want her to die. I want to see pure horror on her face and hear her scream in pain." Boy Y, who had allegedly repeatedly used vile transphobic language about Brianna, replied: "Really? All I wanted to see is what size dick it had." In another message, Girl X allegedly chillingly said: "I really want one of its eyes. They have pretty eyes."

In earlier messages, on January 23, Girl X told Boy Y she knew a lot about US serial killer Richard Ramirez, known as The Night Stalker, adding "I could talk about him for like two hours, including quotes and dates of stuff". In a statement which was read to the court, Brianna’s mother, Esther Ghey, said generally, her daughter would stay in at weekends as she suffered from anxiety and did not go out on her own.

The teenage schoolgirl was allegedly lured to the park and killed by two other teenagers (
Two teenagers, named only as Boy Y and Girl X during proceedings, have been accused of killing Brianna (
Cheshire Police)

She added: "I know she would sometimes spend time with girl X after school. Brianna was always home from school before I get home from work, so I don’t know how often they spent time together." On the day Brianna died, Ms Ghey said she received a text message from her daughter to say she was on the bus on the way to meet Girl X, saying: "I’m scared." Ms Ghey texted back "That’s well good”. She added: "I was really proud of her. I don’t think she ever saw it."

On Wednesday, boy Y was watching proceedings remotely over a videolink, while girl X was in court. Both defendants deny murder.

The trial was adjourned until Thursday morning.