Thievery in da house!!

Okay so I live in a big shared building.. Umm... It's like a.... Temporary living area for retards like me with autism, we all have a bedroom, then there's a communal kitchen area. ANYWAY!!

Fridge shelves are split between the residents, we get a shelf each. 3 days ago I noticed MY energy drink vanished, and I felt a bit disheartened about that, the dude living next to me is always chugging those sorts of drinks so we knew whom the culprit was. Next day the staff people talked to him about it, basically just saying "divvint nick owt, alreet?" and I thought that was the end of that, so I went and got some more and put them in the fridge..... Then about 4 hours later, they were gone, so the staff talked to him about it again, THIRD DAY!! OH!! VANISHED AGAIN!! I sort of confronted him about it and he denied it all... But instead of getting mad, I bought him 2 energy drinks, and took it as a lesson. Told him there were no hard feelings over it... I ain't putting them in the fridge again tho... We're sorta gonna have an intervention about it tomorrow so eh.. Is it better to forgive and forget? ┬┴┬┴┤•ᴥ •ʔ/