Many players have reported seeing his ghost in the Vercetti Estate. Players have reported having heard windy voices and strange whistles all over the mansion. It is believed to be the ghost of Ricardo Diaz since he was murdered in his mansion.
His ghost is believed to roam around the mansion at late hours. He was of cunning nature when he was alive, so it is possible for the ghost to get hostile at times.
A weird observation can also be made at the first floor of the mansion because of the religious portrait that can be found hanging on the wall. Religious portraits are often used for the avoidance of any demonic activity within the possessed object or region. This could be a plausible reference that the Vercetti Estate is haunted by ghosts. It is named as bible1 in the internal files of the game. It is also plausible that it possibly belongs to Ricardo Diaz, a conceivable Catholic.
The ghost could also be a poltergeist. Similar to poltergeist activities, players have reported that his ghost is the one behind changing the portraits from their initial positions. This fact is also discarded as many players hold the opinion that the portraits were displaced by the Vercetti gang after their takeover.
In the following video an inexplicable green glow can be observed from 0:01 to 0:11, this glow can only occur after the Vercetti takeover, due to this fact, this glow has been interconnected with the Ricardo Diaz Ghost. This could be a plausible fact as green glow occurs in paranormal regions. Players have interlinked this glow with the Ricardo Diaz myth and this fact could also be conceivable, with respect to the reason that this glow can only be observed after the Vercetti takeover.
The light bulb behind the stairs is non-functional but the light still glows within the bulbs region from an unknown source. It has been speculated to be a slightly occult occurrence, although this fact has also been disputed.
A photograph, featuring a strange smoke was uploaded on the web. The authenticity of the evidence is yet to be disclosed. The smokey figure was captured on the stairs of the Vercetti Estate.