Newly-released warrants reveal that a Richmond County deputy’s arrest this week stemmed from an investigation into a stolen Oxycodone prescription and her personal ties to a suspected gang member at the center of the case.
According to investigators, Deputy Diana Santiago responded to a theft call on Sept. 8 at the CVS Pharmacy on Walton Way. A woman had reported that someone picked up her prescription for 90 Oxycodone pills without permission. Surveillance footage showed a pharmacy employee, identified as Sabel Williams, handing the medication through the drive-thru window to a man later identified as Chad Walker, the warrants say.
Investigators determined that Williams left her post inside the pharmacy, took over the drive-thru station, and personally handed the drugs to Walker. Both were charged the next day, and Deputy Santiago helped take Williams into custody.
What investigators didn’t know at the time was that Deputy Santiago had a personal relationship with Walker. After the arrest, Deputy Santiago admitted to having dated him and acknowledged that she knew he was a member of a street gang known as “Loyalty Over Everything.”
Warrants say Deputy Santiago was also present during Williams’ interview with detectives and later leaked details of that recorded conversation to Walker. Investigators became suspicious when Williams reported that Walker somehow knew everything discussed during the interview — something only Deputy Santiago could have shared.
During a later interview with internal affairs, Deputy Santiago confessed to having an intimate relationship with Walker, visiting his residence while on duty, and using sheriff’s office databases to look up information for him.
Those admissions led to felony charges including conspiracy to obtain a controlled substance, unlawful street gang activity, and violation of oath of office.
Deputy Santiago, a five-year veteran of the Richmond County Sheriff’s Office, was fired immediately after her arrest on Monday and remains jailed without bond.
Her arrest also followed a post by a YouTube creator known as Shields of Shame, which showed a 47-minute video of Deputy Santiago making video calls with a different inmate from another county. In the footage, recorded at Greene County Jail, Santiago is seen talking to Brown while on duty and later at home. In one clip, she complains about her pay and exchanges “I love you’s” with him.
Deputy Santiago is also the same officer who fired a shot at a fleeing suspect in May 2024 after he allegedly opened fire during a domestic dispute. Quandre Davis, 31, was captured without injury, and Deputy Santiago was placed on administrative leave.
Deputies say Davis fired a gun near a woman and again while she was in her car, then fled after threatening officers. The sheriff’s office handled the investigation internally since no one was hurt. Davis is a convicted felon released from prison in 2022 after 14 years, and he faced new charges including aggravated assault and firearm possession.
