Suspected killer identified in 1992 cold case murder of an Alameda woman

A suspect has been recognized within the 1992 chilly case homicide of an Alameda, Calif., girl, in accordance with the San Mateo County Sheriff’s Office.

Gregory Marc Riviera, 50, who died earlier this yr, was recognized utilizing fingerprints because the suspect within the killing of 25-year-old Juliette Rivera, the sheriff’s division mentioned in a information launch.

Riviera evaded arrest for 30 years in reference to homicide by assuming his brother’s identification, authorities mentioned.

The case started when the sheriff’s division launched a lacking particular person investigation for Juliette Rivera on July 7, 1992, authorities mentioned. Investigators contacted Riviera, an acquaintance of Rivera’s.

Police mentioned they started to suspect Riviera was concerned within the girl’s disappearance as a result of inconsistencies in his statements to detectives.

A girl’s physique was discovered July 17, 1992, by a farmworker in a rural space of unincorporated San Mateo County, in accordance with authorities. The physique, which was badly decomposed, was later recognized as Juliette Rivera. An post-mortem confirmed that she suffered from blunt power trauma to her left rear cranium from a flat object.

A warrant was issued for Riviera, charging him for the homicide, however he had deserted his residence on July 29, 1992, and went lacking for 30 years, police mentioned.

On May 12, 2022, the San Mateo County Sheriff’s Office obtained a name from the Merced County Coroner’s Office, saying that an unsheltered man recognized as Jon Paul had handed away earlier this yr, in accordance with officers. The Merced County Coroner’s Office carried out fingerprint evaluation to seek out the person’s subsequent of kin and the fingerprints matched Gregory Marc Riviera.

The coroner’s workplace discovered a warrant for Riviera’s arrest and labored with sheriff’s detectives to verify his identification, in accordance with police. During the investigation, detectives found that Riviera had a brother named Jon Paul, who was nonetheless alive however coping with medical points, Paul’s daughter advised the coroner.

Jon Paul’s daughter additionally advised police that Riviera and her father used one another’s identification for 30 years to evade authorities.

“The closure of this 30-year-old cold case homicide could not have been possible without the assistance of the Alameda Police Department, the Merced County Sheriff’s Office and Coroner Bureau, and the San Mateo County District Attorney’s Office,” the sheriff’s workplace mentioned in an announcement. “Thank you all for your collaboration and tremendous work.”

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