Seeking Rule Clarification (NFL)

[FormerUmp]

I'm sure a lot of you are familiar with this play. I'm just looking for what officially the right call would have been here.

In my opinion, we have a clear fumble recovered by Jacksonville. My question is about whether or not the Jacksonville player should have been allowed a potential return as he wasn't touched after he gained possession of the ball, or do you still go back to the reason he was on the ground to begin with and rule him down by contact?

I've seen people argue that it shouldn't have been a turnover at all because Lewis "re-possessed" it when he pinned it against his leg, but I believe he would have to "survive the ground" at that point?

Ultimately I'd just like to know what the right answer is instead of seeing clueless people argue back and forth. Any help would be much appreciated. Thank you.