A 13-YEAR-OLD Clydebank girl has been left suffering from post traumatic stress disorder after being plied with drugs and raped by an older man – who she already knew.

Faifley beast Mark McKinney, now 32, launched his assault after forcing the girl to take heroin, cocaine, cannabis and booze.

He had previously groomed her through mobile text messages before launching his attack in September 2018.

McKinney denied the charges against him, but forensic examiners found the victim’s DNA under his fingernails after the brutal assault was reported to police.

And he was caught on CCTV walking along the road holding hands with her – despite her young age, and the almost-20-year age gap between them.

Twisted McKinney, of Milldam Road, also took her on a journey to a drug dealer’s house in Drumchapel where he swapped a laptop for a bag of cocaine.

McKinney is now facing years behind bars after being convicted at High Court in Glasgow last week.

Despite the nature of the charges against him, McKinney was allowed to remain on bail for 16 months before the case was called to trial.

This led the victim’s family to move house as they “saw him everywhere they went”.

Following the guilty verdict, the victim’s mum – who, like her daughter, cannot be identified for legal reasons – told the Post: “My daughter has been devastated by what happened to her.

“She now suffers from PTSD and is on various medications because of what he did to her.

“We are glad to have some sort of closure now, and hope that McKinney will be sent to prison for a long time.

“He knew my daughter before the attack, and was well aware of what age she was.

“He groomed her through messages on her phone, and then gave her heroin, cocaine, cannabis, and alcohol before raping her.

“Justice has been done in the end, but it has had a terrible effect on our family.

“When my daughter told me the day after it happened, it was a shock as we all know him.”

Speaking about the court case, at which her daughter gave evidence via a video link, she added: “DNA evidence doesn’t lie, and he had her DNA under his fingernails.

“I am so proud of her, for the way she was able to give evidence in court.

“After the trial, one of the court officials told me she was one of the best people he had ever seen giving evidence.

“She is a tough cookie, and we will get through this as a family.”

McKinney was also convicted of sexually assaulting another 13-year-old on the same day.

As well as the two sexual assault charges, he was also charged with six drugs offences, but these were dropped by prosecutors before the jury was sent out to deliberate.

Both victims gave evidence in the trial.

During his closing speech, prosecutor Liam Ewing told jurors that evidence they had witnessed was “compelling”.

Mr Ewing said: “He [McKinney] had sexual intentions with an underage child.

“His purpose was sexual, there can be no doubt about that.

“He had used drink and drugs to lure them into a house, and had tried to get them to come back for a secondnight.

“Both victims were still children, and when drinking, were more vulnerable to an adult’s sexual advances.

“The accused at first denied to police cocaine was used, but then changed his position, as he did in other aspects.

“He engineered the situation to have some sort of sexual contact with girls, who were children.

“He is an adult who took advantage of them.

“[McKinney] told police there had been no sexual contact what so ever, and he lied about buying alcohol, until police provided footage of him doing so, and forensic scientists provided expert witness evidence and DNA evidence of [sexual assault].”

Speaking about the victims, Mr Ewing continued: “Both witnesses were credible and reliable.

“During their evidence, they described in detail what happened to them. They answered questions without much hesitation.

“The way they stood up to and answered questions while being cross examined gave them more credibility and reliability.”

The jurors agreed with the prosecutor, and found McKinney guilty on both remaining charges of sexual assault. Both verdicts were delivered by majority.

The victim’s family also asked the Post to point out that the man whose flat the attack took place in was also a victim of McKinney’s.

Click here for all the latest news from Clydebank and the surrounding areas

The girl’s dad said: “McKinney took a liberty with him – telling him he was using his flat to have a drink at. He had no say in the matter.

“He was taken advantage of as well, but gave evidence against McKinney in court, telling the trial that the morning after the attack McKinney boasted to him that he had ‘p***** my daughter’.

“He is not to blame for this, was never a co-accused, and I would ask that no one harasses or threatens him on Facebook or anywhere else as he had nothing to do with what that beast did.”

Defence counsel Jennifer Bain will give her plea in mitigation when the case next calls.

Judge Lord Matthews placed McKinney on the sex offenders register, deferred sentence for background reports, and remanded him in custody.

McKinney, who has previous convictions for minor road traffic offences, will be sentenced on March 11.