The dog's human companion, who was homeless, had been stabbed to death in Sao Paulo, Brazil.
After the stabbing, the dog chased the ambulance carrying his owner to the Santa Casa de Novo Horizonte medical center, according to local reports.
The dog has remained in the vicinity of the building, but has never tried to enter the hospital. Hospital staff, who quickly became accustomed to the dog's presence, have offered food and water to the dog.
A local resident, Cristine Sardella, shared photos of the dog to her Facebook page, which have since gone viral:
According to local reports, the dog had been picked up by a rescue organization, only to escape and walk over three kilometers to get back to the hospital.
A hospital staff member is said to have decided to adopt the dog. However, the hospital director stated that the staffer will only take the dog when the dog is ready to leave his spot outside of the hospital.