Police at my neighbour's early this morning.

There was a police car parked at my neighbour's this morning, around 8am.  I was up early as I was going out; came back this afternoon and it was gone (as have they - no cars in their drive).  We say hello when we see eachother but that is all.  As such, I can't really ask what it was about.  I've had a look at the twitter of my local police but there's nothing on there.  I've always thought their son was a bit of a rogue but that may be incidental.  It's very annoying that I may never find out what was going on.