"Their dog was mistakenly euthanized in 2009 despite the shelter placing a hold tag on Avery after the family came to claim her at the shelter, but was unable to immediately pay an $80 fee to get her back. When the family returned with the cash, they learned Avery had been put down."
Basically the dog ran away, they went to pick it up from the shelter, but they didn't have the $80 to pick him up. The shelter placed a hold on it that they were coming back. They came back the next day with the $80 and the dog had been killed.