It seemed he had all the faith in the world that his family would return. But judging by the sparse supplies left with the dog - a stick of rawhide and a bag of kibble - Truman would have been waiting an eternity.
Instead, the skittish dog was finally lured into a car and taken to nearby rescue Agape Fosters.
Once there, it didn't take long for Truman's seemingly broken spirit to make a resounding rebound.
And for his story to spread far and wide.
"After The Dodo story, Truman had many offers from across the U.S. to adopt him," Dianna Helmers, founder of Agape Fosters, tells The Dodo.
A woman named Melissa Karsten. She had worked with Agape Fosters in the past and Helmers thought her calm, kind demeanor would be a perfect fit for an older dog like Truman.
Days later, Truman attended a fundraiser and mingled with the crowd all day.
"He is such an amazing dog and was just a social butterfly at the event," Helmers notes.
At the end of the day, he went home with Karsten.
"He may be enjoying being a house dog for the very first time," Helmers adds.
Dogs like Truman, discarded for reasons we'll never know - or, at least, understand - abound at shelters across the U.S.
"They all have their own sad story of why they are homeless," Helmers says, adding, "Please adopt and not shop for your next canine family member and give them a good life their whole life."