My friend had been in abusive relationships all of her child and adult life and her last abuser was her sons father (whom she is now away from) and due to him having lived in an abusive household then he attended an after school club specifically for kids in his same position.
The kids would do arts+crafts within the club and there was volunteers who belonged to the church that the club was held in, and some of these volunteers would take the children on days out etc, etc.
One day I was popping into my friends for a coffee and I passed her 10 year old son going down the stairs with an elderly man, they were coming down from hers & I was going up, I said Hiya to her son and he said Hiya back and he seemed his usual cheery self, but the man that he was with couldn't have eye contact with me & he put his head right down and I got a 'punch in the gut' feeling - instinct I think - and right away I KNEW this guy was a paedophile and I shouted down to her son - in the cheeriest fake voice I could muster - "so whose this & where you off to" and he told me that the man was from the X club and they were going to x,y,z, the son had just been picked up from my friends house, I said bye to her son & quickly dashed into my mates house but I didn't want to sound like a nutter and say "that guy with unsupervised access to your son is a beast" - bearing in mind that he was a volunteer working with vulnerable people for a charity, his disclosure would have been done etc,etc - so I asked a few questions about the guy and it turned out that he was a church goer, unmarried, rich, etc,etc and had been volunteering at the club for some time.
Anyway to cut a long story short, (lol) my friend actually started suspecting herself that this guy was off - he started making negative comments about her parenting, undermining her, he gave her son a phone to keep (this was strictly against club rules) and took lots of photos of her son- albeit normal ones - and my friend stopped her son going to the club & the manager met up with my friend to discuss the reasons as to why; well the manager looked as though she too believed him to be a paedophile, I thought she was going to be sick (it was she who had first interviewed him)- and she made a remark about him always taking boys, and never girls, on outings and she was absolutely livid about the phone present.
Nothing ever happened to my friends son but IMO the grooming process had started already.
I never would have forgiven myself if he had have been abused but I honestly felt like I could have caused unnecessary fear+alarm if I had have just said "I just know hez a paedophile, my gut told me", its a strange feeling but also a very strong one, and the gut instinct feeling should be trusted 95% of the time.
IMO I never would have allowed a guy without kids of his own (and a church member, cliché) to be a volunteer for children, it just doesn't sit right with me, call me sexist, etc,etc but I watch the news & read the papers, you can never be too careful.
Overall a very scary experience.