Is it alright that I was working with my friends in my backyard?
Why were you doing in your backyard?
I wanted to help them dig a hole
It's good that you wanted to help your friends. They will appreciate it and help you when you need it too.
I just want to bury my brother in the hole.
If you and your friends were digging a hole so that you could stick your brother in it, then this was a bad idea. Murder cannot be condoned, and if you go through with this plot, you will end up in prison.