"Former owners" story sounds sketchy as fuck, I'm thinking they did this and made up a mystery stranger to cover their asses
The "I gave my dog away" sounded bad but then again, I'm (maybe) getting a new Rottie for free tomorrow, a former show/breed girl who's retiring and needs a good home - so people do practically give away dogs but anyone who would give their dog to a "stranger" without checking them out first is a POS
Edit saw the video, "former owner" is a ghetto brew who lives in a shithole, pretty obvious who did this.