If you found out your best friend's brother got arrested, would you tell her or would you stay out of it?

I found out yesterday that my best friend’s brother got arrested for failure to pay child support. She has been my best friend since I was around 2 or 3, and consequently, our entire families are friends with each other. I heard about his arrest from some other friends, and I am the only one of that group that is in touch with her (his sister, who’s my friend).

Apparently he is seen as the black sheep because he borrows from their parents, and none of the other siblings have, ever. They feel he takes advantage, and they feel they’ve never asked for a hand-out, and are hard working, he’s got drinking and gambling issues, etc. and goes to the parents for money which the other 6 siblings resent.

I’m not involved in any of that gossip. He is my friend, but we are not close friends.

My only question now is should I tell her that he’s arrested, or should I not? If I don’t, she may be upset that I did not tell what she may consider an important piece of news. However, I also can understand the importance of staying out of it.