A service dog in Kentucky returned home after being separated from his family for four days.

In an interview with a local news station, Carolyn and Jason Cooper begged for their family’s service dog Radar, to come home.

As the cameras were rolling, Jason spotted what appeared to be Radar more than half a mile away.

At first unsure, the Coopers ran across their yard, jumping over fences to get to Radar.

“I had hope, but I was afraid, this is the most amazing thing, I can’t believe it,” said Jason.

Radar was a lifeline for the Cooper’s daughter Madeline and her sister Sophia, both suffering from a terminal genetic disorder.

The family had moved to Kentucky to start a new life after their two daughters passed away.

Radar was the only physical memory left.

“He’s one of the only souls who has the same memories and experience as we do,” said Carolyn.

(Copyright (c) 2015 Sunbeam Television. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)

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