Go to the House of Death from 9:00 pm to 6:00 am. When you get there in that time frame, CJ will start losing health until you die, so be careful. A ghostly silhouette will appear in the tombs, where he will leave his open grave to the crucified tomb, where later this ghost will become a faceless person in which he will be protected and attack CJ. After a few seconds, 2 invisible ghosts with a fire extinguisher and spray may appear and try to drown CJ. The crucified tomb is possessed, so if CJ climbs that grave, he will die instantly. You can go to Fort Carson and Las Brujas and find the twin mansion to teleport to the House of Death or find it yourself. Good luck!