Weird news - Dog dedicated to master, stays by his grave for 6 years

They say that a dog is devoted to human, called man's best friend. There have been many cases where a dog has put in his best efforts to save the human, and other cases where a dog has senses danger (including a fire in the house) and managed to get his owner to get out of danger. A dog is also the prime leader for many blind people, leading them around safely and acting as their eyes.
This devotion to their human masters is a well deserved reputation, such as when you consider the following case where the devotion of the dog to its master went well beyond the life of the master, and it seems wonderful how the dog could detect where its master was buried, since the death took place in a hospital and the dead body was then taken to the burial ground to be buried. After this, even though the family wanted to take the dog to the house, he came back to the burial ground (link to article):

The dog called Capitan, a German Shepherd, had disappeared from his home in the small town of Villa Carlos Paz in the centre of Argentina following the death of his owner, Miguel Guzman, in March, 2006. Nobody in Guzman’s family noticed the absence of the dog for days, until the members visited Miguel’s grave at a municipal cemetery. “Damian (Guzman’s son) started to shout that it was Capitan and the dog came toward us barking, as if he were crying,” the New York Daily News quoted Guzman’s wife, Veronica Moreno, as telling the La Voz del Interior.