When the trio stepped inside, there were a few hints that something was amiss.
"We noticed some things were in disarray, but our first thought was we knocked something over as we were leaving," Franco recalls.
But Benny had his own thoughts. He sniffed at the pile on the floor. He paced from living room to kitchen, growling.
"As this is happening, I looked around and realized we had been burglarized," Franco says.
Here and there, things were missing. But Benny refused to stop pacing feverishly.
Suddenly, a floorboard upstairs creaked.
"The person was still in our house," Franco says.
Still downstairs with the couple, Benny was frantic as Franco yelled, "Get out of my house right now. My dog is going to come upstairs. He's not happy."
A moment later, an upstairs window opened. The intruder leapt outside, disappearing empty-handed.
And suddenly, a shelter dog who had spent much of his life beaten down brutally in an illegal fighting operation had his day.