I had a few concerns, he often "joked" about highschool girls but he was super young at the time too (like 22-23) and then once he was a little to active trying to get a niece of ours who was 15 to drink with him when we were all staying somewhere. It ended up with he and I having words very late in the evening when just the 3 of us remained up after everyone else went to sleep. He maintained he was just having fun and had no ill intentions. My spidey sense was tingling and I stayed up all night until he finally crashed. The next day I wrote the whole thing off as me being over concerned. My wife was incredibly upset with me for it until about a year later when we all realized what he was likely trying to do that night. He was an incredibly charming, good looking and very likeable guy. When what happened in felony 1 came out I was in the process of helping to plan a birthday party for him.
First time he went to court over all of this several others came out of the woodwork. Friends of his younger sister, girls he went to HS with. One incredibly brave girl came to his first trial and sat next my SIL in the court room and as soon as he saw her he turned white and plead guilty to a lesser charge. She had been raped by him at a sleepover with his little sister when she was 14 and he 17. I will never forget her amazing bravery and what it meant to our family. I don't think she was even going to testify, she was shaking like a leaf, but it scared him badly. Trial 2 was several years and sadly several more victims later, though I am only certain of the 1 he was convicted for, his live in girlfriends 13 year old daughter. Last I heard she is doing poorly as is her Mom who was warned very explicitly by multiple members of our family when she started seeing him. I am sure the guilt she carries is immense. But as I said, he is good looking, charming and very likeable. He also has, or at least I hope had, a family that coddled, enabled and deflected for him. When she was warned his entire family assured her that it was just a nasty divorce with bad feelings and he was a poor victim. She bought it, sadly.
The worst part of all of this is it is actually far, far worse than I can even put here publicly not because I want to protect him. I would love to out him here, but his victims are all still in the area and they don't need it known and I am trying to hold on to my anonymity.
to answer your very first question he actually was around my kids. But no I never let any men around my kids without me or my wife around.