lost phone, the conclusion

It took them three weeks to decide they found my phone. Then another week for them to ship it to me. And it's actually mine! Now I can get all my photos off of it. And my curiosity about whether they found it is satisfied. But I still don't what happened to it. Did it just get lost, and the flight crew guy that looked for it didn't do it right? Or did that passenger actually steal it, and decide an S4 wasn't worth anything, so he left it behind?

By the way, it still had 41% battery remaining.