Lavelle is confronted by the paedophile hunters in his car, the video shows.
‘What were you going to do with this young lass?’, asks a member of Dark Justice.
‘I was just going to talk, I wasn’t going to do anything’, he says shaking his head.
‘You knew this girl’s age. No one’s forced you to come here tonight. You came here off your own back, off your own actions.’
He was later arrested by police officers when they arrived at the scene.
Newcastle Crown Court heard in October 2017 Lavelle started chatting to a ‘Katie’ and, after being told she was 15, started to warn her of the dangers of social media.
Prosecutor Jenny Haigh told the court: ‘He told her to be careful while using Qeep as there was funny people on the site.
‘When she said she would, he said ‘I hope you do love, I would hate anything to happen to you’.
‘He also said ‘I’m a good guy, unlike most’.’
Lavelle, of Wellbeck Road, Walker, Newcastle, was arrested after he arranged to meet the teen but was confronted by Dark Justice.
He pleaded guilty to attempting to meet a child following sexual grooming.
Recorder Sophie Drake sentenced Lavelle to 14 months imprisonment with a ten year sexual harm prevention order and sex offender registration.
The judge said she accepted Lavelle’s remorse for what he did is real but told him: ‘You contemplated serious sexual offending against a 15-year-old child.’
Jane Waugh, defending, said Lavelle has had serious health problems, including cancer, and had worked all of his life until he was diagnosed.
Miss Waugh added: ‘He is disgusted by his own behaviour.’