News Release, Police Department

Update regarding homicide on 100 block of Cassia Drive

May 17, 2023


Media Contact:

Officer Cassondra Fovel


Update Regarding Homicide on 100 block of Cassia Dr

HAYWARD, Calif., On Thursday, May 11, 2023, at about 2:00 PM, officers responded to the 100 block of Cassia Dr after receiving multiple 9-1-1 calls about gunshots in the area.

Upon arrival, officers located two adult victims inside a residence, suffering from gunshot wounds. Medical personnel responded, and both victims were transported to a local medical facility for treatment. A five-year-old child was also inside the residence and was found unharmed.

The first victim, 30-year-old Monique Aldridge of Hayward, was pronounced deceased at the hospital.

The second victim, a 28-year-old-male of Oakland, is still hospitalized and is in critical but stable condition. His name is not being released at this time.

It is believed that Aldridge and the second victim were in a dating relationship and lived together during the incident.

During the initial hours of the investigation, information was received that led to the identification of the man believed to be responsible for the murder of Aldridge and the attempted murder of the second victim.

This person has been positively identified as 33-year-old San Mateo resident, Vaughn Boatner (Picture attached).

During the investigation it was also learned that the five-year-old boy at the scene was Aldridge’s and Boatner’s child.

Following his identification, an arrest warrant for Boatner and search warrant for his residence were authored and approved.  Boatner was not located inside the residence and is considered at-large.  Boatner is believed to be armed and is considered dangerous.

It is believed Boatner has access to various vehicles, and it is still being determined what mode of transportation he currently utilizes.

We want to thank the San Mateo County Sheriff’s Office, the San Mateo Police Department, and the Alameda County Sheriff’s Office for their assistance with this investigation and the execution of the search warrant on the day of the homicide.

We would also like to thank the U.S. Marshals Service for their support and assistance with this investigation. The U.S. Marshals has announced that they are offering a $10,000 reward to anyone who provides information that leads to the arrest of Boatner.

If you know Boatner’s whereabouts or have any information about this incident, please contact Detective Green at 510-293-7176.

The Hayward PD case number is 2023-26190

Boatner, Vaughn



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