Vallejo and Hercules police are still trying to figure out exactly what happened in an apparent killing spree involving one man and string of victims but investigators say Efren Valdemoro killed at least two people in a jealous rage.

Police say Valdemoro's girlfriend, Cindy Tran , owned a house in Hercules and rented rooms out to Frederick and Ricardo Sales .

In August, Valdemoro became suspicious that Tran was having a romantic relationship with one of the men, so he killed 73-year-old Ricardo Sales in an angry rage last Friday morning, police believe. Sales' body was discovered Saturday morning and his 35-year-old son, Frederick, hasn't been seen since.

Tran worked at a beauty salon in Vallejo and a coworker told Bay City News that Valdemoro would visit her there frequently.

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