Vampire: The Masquerade - Bloodlines/Santa Monica

Wherefore Art Thou, Mercurio?
Mercurio is in Santa Monica Apartments (14 on map) in room 4. To reach him go out of your haven, go downstars and exit the door. A bum will approach you, dismiss him. Follow the alley and go to the right. You will see Mercurio bleeding and walking to the Apartments. Now just follow the blood.