Sandusky police were hoping to find the man who stopped when he saw the home in the 2000 block of Columbus Avenue ablaze early on Nov. 21.
All but one resident had escaped the fiery house.
But one man, 22-year-old Rob Olvera, got trapped on the roof of the house when smoke kept him from going down the stairs inside.
The Good Samaritan grabbed an extension ladder from his truck, and carried it over to the porch.
After Olvera climbed down, the anonymous man grabbed the ladder, strapped it back to his truck and drove away.
"To the best of my knowledge, we don't know who he is," assistant chief John Orzech said.
"I would like to say thanks for taking a quick and decisive action, and pretty much saving a life," he said. "People usually don't get involved. He did the right thing and went on his way."
Olvera, too, previously told the Register he was simply thankful for the man's help. The first floor of the home was gutted and the upstairs significantly damaged by the smoke.
Ultimately, no one was injured in the fire because of a stranger's help.
"It's pretty impressive if you ask me," Orzech said.