'Sinatra' once belonged to Zion Willis, 16, who died in a gun accident.
Somehow, 'Sinatra' ended up in a Florida neighborhood, where the Verrill family took him in.
The family connected with the Willis' through social media, and confirmed the dog's identity.
'Sinatra' will be returned on Sunday, but it is still a mystery how he traveled 1,200 miles from Brooklyn to Seffner, which is near Tampa.
----------
* Follow us on YouTube
* More local news
* Send us a news tip
* Download the abc7NY app for breaking news alerts