Capitán, a faithful German shepherd, has refused to leave his master's graveside for six years.

Argentinian Miguel Guzman died suddenly in March, 2006. By the time Guzman's family returned home from the funeral, the family dog, Capitán, was gone.

A week later, Guzman's family found Capitán sitting by his owner's grave, wailing.

"We searched for him but he had vanished. We thought he must have got run over and died," Guzman's widow, Veronica, told Argentina's Cordoba newspaper.

"The following Sunday we went to the cemetery and Damian recognized his pet. Capitán came up to us, barking and wailing, as if he were crying."

She added, "We had never taken him to the cemetery so it is a mystery how he managed to find the place."

Guzman brought Capitán home in 2005, as a present for his son, Damian, but Capitán developed a strong bond with Guzman instead.

Capitán has rarely left the cemetery in Villa Carlos Paz, Argentina, since.

Watch a video of Capitán from Argentinian news source La Voz below:

Hector Baccega, administrator of the Villa Carlos Paz Cordoba cemetery, said that cemetery staff are now feeding and taking care of the loyal dog, even keeping him up-to-date with his immunizations. Baccega says the German shepherd walks with him through the cemetery by day, but always spends the night with his late master.

"During the day he sometimes has a walk around the cemetery, but always rushes back to the grave. And every day, at six o'clock sharp, he lies down on top of the grave stays there all night," Baccega said.

Guzman's son, Damien, 13, believes Capitán will remain at the grave for the rest of his life.

"He's looking after my dad."