Lanterns have been placed outside the murdered man's residence.
An adult woman has been arrested on probable cause on suspicion of murder, which is the stronger degree of suspicion.
By Monday at the latest, prosecutors must decide whether the woman should be remanded in custody or released.
The 55-year-old man, who was arrested on Wednesday and later detained on reasonable suspicion of murder, has been released.
"Suspicion against him remains but is considered to have weakened," the police announce.