DATE/TIME: Thursday, June 25, 2026, at 8:15 p.m.
INCIDENT: Investigation Leads to Arrest of Two Convicted Felons and Recovery of an Illegal Firearm
LOCATION: 21300 block of Nisqually Road, Apple Valley
SUSPECT(S): Ronaldo Monroe, 46-year-old, Resident of Pomona
Robert Guillebeau, 36-year-old, Resident of Los Angeles
VICTIM(S): State of California
SUMMARY: On Thursday, June 25, 2026, deputies assigned to the Victorville City Gang Impact Team (VCGIT) conducted an investigation into the illegal possession of firearms by 36-year-old Robert Guillebeau, a resident of Los Angeles.
The investigation ultimately led to the service of a search warrant at a residence in the 21300 block of Nisqually Road in Apple Valley. During the search warrant service, deputies contacted 46-year-old Ronaldo Monroe, a resident of Pomona, who was found to be in possession of a privately manufactured Polymer 80 handgun, a 30-round large-capacity magazine, and a 15-round large-capacity magazine.
The investigation revealed that both Monroe and Guillebeau were convicted felons who were prohibited by law from possessing firearms or ammunition.
Monroe and Guillebeau were arrested and booked into the High Desert Detention Center for felony violations of Penal Code 29800(a)(1) – Felon in Possession of a Firearm, Penal Code 30305(a)(1) – Felon in Possession of Ammunition, and Penal Code 32310 – Possession of a Large-Capacity Magazine.
The San Bernardino County Sheriff's Department remains committed to proactively investigating illegal firearm possession and holding prohibited persons accountable. Through targeted enforcement and proactive investigations, the Victorville Gang Impact Team continues to remove illegal firearms from our communities, reduce violent crime, and enhance public safety.
Anyone with information about this investigation is urged to contact the Victorville Police Station at (760) 241-2911 or Sheriff's Dispatch at (760)956-5001. Callers wishing to remain anonymous should call or text ''Report'' to We-Tip at 844-909-3006. Online reporting is also available at https://mobile.catapultems.com/sbcsd/Sites.
Refer: Sergeant M. Young
Station: Victorville Station / Victorville City Gang Impact Team
Phone No. (760) 241-2911
Case No. 182603730
SHANNON D. DICUS, Sheriff-Coroner
San Bernardino County Sheriff-Coroner Department
