What do I do with a locked iPad?

Long story short i found an ipad on my plan seat and the flight attendent just said to wait till we board b/c it was probably from a previous flight. I did and didn t know what to do so i just went home tired and confused. Now I m here and I don t know what to do with it. Do i sell it? Can i even sell it?
Added (1). By the way its an iPad 2 or 3 i think? And its completely locked. Like even with the reset and everything.
Added (2). OKAY Yeah every seems to think i stole it, though i don't want it So i'll just dump it and call it a day thanks everyone for telling me what i SHOULD'VE done instead of advice that could actually be applied NOW.

Read more: What do I do with a locked iPad?