from the Morongo Basin Station responded to a residence in the 2900 block of Warren Vista Drive, in Yucca Valley, for the report of a deceased male, identified as Richard Dionne. The Coroner’s Office also responded and determined an autopsy would be necessary to definitively establish Dionne’s cause and manner of death.
The Sheriff’s Specialized Investigation Division – Homicide Detail also responded and assumed the investigation.
On August 16, 2023, the autopsy revealed Dionne was murdered. Through additional investigation, Homicide detectives identified the suspect as Joseph Grayshock.
On Tuesday, November 7, 2023, the San Bernardino County District Attorney’s Office filed murder charges on Grayshock. Grayshock is currently in custody in Riverside County on unrelated charges, and will be transported to San Bernardino County once his case there is complete.
Anyone with information regarding this case is urged to call the Homicide Detail at 909-890-4904. Callers wishing to remain anonymous should contact the We-Tip Hotline at 1-800-78-CRIME (27463) or go to www.wetip.com.
Refer: Detective Justin Carty
Station: Homicide Detail
Phone No. 909-890-4904
Case No. DR# 072302521 H# 2023-088
DATE/TIME: November 7, 2023
INCIDENT: PC 187 - Murder
LOCATION: 2900 Block of Warren Vista Drive, Yucca Valley
SUSPECT(S): Jospeh Grayshock, 49-years-old, Resident of Thousand Oaks
VICTIM(S): Richard Dionne, 64-years-old, Resident of Yucca Valley
Source: San Bernardino County Sheriff’s Department
