Why is the ACDC drummer in jail?

I'm curious to know, what's the reason behind the ACDC drummer's current imprisonment? Was it a result of a personal or professional dispute? Or did he get caught up in something legal that has nothing to do with his music career? I'm sure there's a story behind it, and I'm eager to hear more about it. It's quite surprising to see a prominent figure in the music industry facing such a situation.