A teenager disliked the girl he is accused of killing after allegedly supplying her with drugs, a trial heard today.

James McCairn, 18, is claimed to have sold MDMA to Cerys Reeve, 14, from his home in Greenock on July 13, 2020.

Cerys’ best friend told the High Court in Glasgow that McCairn and Cerys used to message each other on social media app Snapchat.

READ MORE: Woman allegedly bought ecstasy from man accused of killing 14-year-old Cerys Reeve by giving her drugs

The witness stated McCairn was later ignored by Cerys for another boy.

The deceased then allegedly blocked McCairn which made him “not like” her.

McCairn is on trial charged with the culpable homicide of Cerys by unlawfully supplying her with ecstasy.

READ MORE: Port Glasgow schoolgirl Cerys Reeve drug death trial begins

Cerys died in the early hours of the morning of July 13 due to MDMA toxicity.

Jurors were played a recorded police interview from Cerys’ best friend.

DC Martin Renfrew asked if McCairn did not like Cerys and she replied: “Yes.”

The witness added: “Cerys and James used to Snapchat each other.

“Cerys patched James for someone else and obviously James didn’t like Cerys.

“Cerys had James blocked.”

The witness claimed that she herself had purchased drugs from McCairn in the past and paid him money owed for MDMA at their school.

She stated that McCairn - who she called a dealer - stopped advertising drugs after Cerys’ death.

The court earlier heard from a 16-year-old witness and friend of Cerys who gave video recorded evidence in March this year.

She stated that Cerys stayed overnight with her on the night of her death.

The witness claimed that Cerys left during the night to purchase a gram of MDMA from McCairn without her initial knowledge.

The witness claimed she was later told by Cerys that she had to pay McCairn £10 for the drugs the next day.

The witness said she left Cerys alone in her bedroom to make them a toastie.

She stated that Cerys had poured a cup of Coca-Cola meantime.

Prosecutor Graeme Jessop asked if Cerys took the cup and she replied: "Yes, she poured the rest of the powder in the cup and took it."

Mr Jessop asked, "Was that in her cup?"

The witness replied, "Yes."

Mr Jessop said, "What did you understand the powder to be?"

The witness responded, "Mandy (MDMA)."

The witness claimed within five minutes Cerys began "acting really weird."

She claimed that she became "touchy" and kept hugging the witness from behind.

She stated that Cerys "could not control her arms" and kicked items off the windowsill.

Mr Jessop asked what things Cerys was talking about.

The witness replied: "She asked me who I was and were she was and asked where I was. “She was talking over herself and having some conversations.

“She kept saying Thursday and saying one of our friend’s names.”

She added that Cerys was grunting, sweating and fell off her bed twice - hitting her head on a TV - which woke her mum up.

It was then the witness claimed that Cerys went into a seizure before a 999 call was made.

Cerys was ushered into her parents bedroom meantime.

The witness said she was informed of Cerys' death later that morning.

The witness claimed she was unaware if Cerys had purchased drugs from McCairn before.

She admitted that she knew of two earlier occasions that Cerys had taken drugs and was sick during one of them.

The witness claimed that she passed screenshots from McCairn's Snapchat which allegedly showed drugs such as Ecstasy and Cannabis.

Mr Jessop asked if the screenshots were adverts for drugs he was selling and the witness replied, "Yes."

The prosecutor also asked if McCairn would have known how old Cerys was and she replied, "Yes."

Gary Allan QC put it to the witness that there were was a significant number of people in that part of the country that would sell drugs to young people.

The witness replied, “Yes.”

Mr Allan said, “The drugs are the same kind of drugs such as Ecstasy?”

The witness replied, “Yes.”

The trial continues before Judge John McCormick.