
bloody
Two of them were security guards: the third one was a technician of the Electric co. where they were working: it happened during the shift change. Some argument started and one guard killed the other while the technician was away: when the technician heard the shots, he rushed to the scene and this costed to him his life as he has been shot in the back and in the neck. The killer eventually wrote a note explaining what happened and committed suicide, the letter has been seized and sent to some forensic laboratory for analysis .
The presence of anybody else at the scene at the moment of the incident has been already ruled out.