Meeting my half brother for the first time?

I've known for a good few years that I have a half brother but he's never been spoken about. Lately though I've been wanting to get to know him, he's completely different from me. I've been brought up in a good solid family set up, had opportunities and been to Uni. He was brought up in foster care and is completely off the rails.

I don't know him and haven't heard very good things about him. The only thing I know about him is that he's 4 years older than me and has been in the army and got kicked out for something violent.

I really want to be there for him if I can, I don't have much family and he's kind of my brother. My mum knows where he currently lives and she doesn't want me to see him, but I really just want to get on a train and go. I want to know him.

I don't know him and I'm not sure how to go about this, he might hate and resent me and I don't know what to expect. Any advice please? :)
Meeting my half brother for the first time?
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