Murder victims ID’d; suspect still on the loose

A couple found dead on a Hesperia home on Tuesday, Sept. 3 have been identified by San Bernardino County authorities, and are deeming the incident a homicide.

According to the San Bernardino County Sheriff-Coroner Department, the victims were identified as Jason Culberson, 43, and Melissa Graetz, 37, both from Hesperia.

The suspect believed to be responsible for their deaths has been identified as Phillip Williamson of Hesperia.

Williamson is also the murder suspect of Brandi Jones, whose body was found inside her vehicle in a dirt field on Friday, August 30, authorities said.  Investigators believe that Williamson may have changed his appearance and has shaved his head and facial hair. 

Subsequently, investigators believe Williamson may be connected with an arson occurred on Monday, Sept. 9 in the 20100 block of Wisconsin Street in Apple Valley.  A strong-arm robbery occurred at such location on August 30, authorities said.

Williamson remains outstanding and is considered armed and dangerous.  Anyone with information regarding his whereabouts is asked to immediately call 911.

Anyone with information about this investigation is urged to contact the Specialized Investigations Division, Detective David Carpenter at (909)387-3589. Callers can remain anonymous and contact We-Tip at 800-78-CRIME or