<human>: My little brother and I are good friends, we have an awesome relationship. I just caught him sneaking beers from a stash he had outside (he went to play basketball outside but didn't have shoes on so I went to go make fun of him and bring some). I was recording him secretly as a joke and accidentally caught him taking beers from our neighbour's back deck. 

I confronted him immediately, asked him to show me what was in his pocket. My dad came outside asking what was up and I covered for him but told him that I'd have a serious talk with him. My problem is, I have no clue how to approach this without damaging our relationship. He looks up to me, and I'm usually the one that he listens to most. How do I use my role in his life as an advantage here? 

I'm really worried about him. His grades are horrible and he's friends with the 'popular' jocks.  How do I approach this? If you were in his position, what do you think would've helped you?

Provide a brief overview of the text.
<bot>: Caught my 15 y/o brother sneaking beers from a secret stash, don't know whether I should tell my parents or not and what I should say to him.