Former Oklahoma County Deputy Charged With Felony Stalking
Former Oklahoma County Deputy Dennis Tran Vu Charged With Felony Stalking
A former Oklahoma County Sheriff's Office deputy has been fired and faces an active arrest warrant after prosecutors charged him with felony stalking involving a woman he previously dated.
Dennis Tran Vu, who worked primarily as a courthouse deputy during nearly four years with the sheriff's office, was terminated after Oklahoma County Sheriff Tommie Johnson III learned that a felony charge had been filed. Vu had previously been placed on administrative leave after the woman sought a victim protective order.
The Oklahoma County deputy stalking case is being investigated independently by the Oklahoma City Police Department. The allegations against Vu have not been proven in court, and he is presumed innocent unless and until convicted.
Oklahoma County Deputy Stalking Case Began After Dating Relationship
Court documents say Vu and the woman met through the dating app Hinge in November 2025 and dated for approximately one month beginning in February. The woman said they broke up in March but initially remained friends.
According to the protective order petition, the woman began noticing what she described as a pattern of stalking in June 2026.
She alleged that Vu unexpectedly appeared at an airport when she returned from an overseas trip even though she had not provided him with her flight information.
The woman also alleged that Vu repeatedly appeared near her workplace after being asked not to come there. In another reported encounter, she said she saw Vu in a parking lot near her job and that he later followed her vehicle in his Suburban along Lake Hefner Parkway.
By August, according to court documents, the woman began receiving threatening and accusatory text messages from unknown numbers. Some of those messages allegedly contained references to the previous relationship.
Those allegations ultimately resulted in the woman seeking a victim protective order.
The criminal investigation is being conducted by the Oklahoma City Police Department rather than the sheriff's office where Vu was employed.
Sheriff Tommie Johnson Fires Deputy After Felony Charge
Sheriff Johnson said his office first acted after learning that a protective order had been filed against Vu.
Vu was placed on paid administrative leave while the matter was being reviewed. Johnson said he terminated Vu's employment after learning Wednesday that the former deputy was facing a felony criminal charge.
“I can tell you that there's no place in law enforcement for any actions like this and how we conduct ourselves, in this agency,” Johnson said.
Johnson also emphasized that employees of the sheriff's office should be held to the same standards as members of the public.
“If our deputies, if any of our staff violate the law, we are going to hold people accountable because that's what we expect of our citizens and our employees,” Johnson said.
Vu had worked for the Oklahoma County Sheriff's Office for nearly four years and was assigned primarily to the downtown courthouse.
The Oklahoma County Sheriff's Office oversees courthouse security along with law enforcement, detention and other public safety responsibilities throughout Oklahoma County.
Johnson said publicly addressing the case was important because his department regularly releases information when other members of the community face criminal allegations.
“Regardless of who you are, what position you hold or the position you have, no one is above the law,” Johnson said.
Dennis Tran Vu Faces Arrest Warrant in Felony Stalking Case
Court records cited by local news organizations show an arrest warrant was issued for Vu in connection with the felony stalking charge. The warrant carries a $5,000 bond.
The woman has also asked the court for protections that would require Vu to remain at least 500 yards away from her and surrender his firearms, according to reporting based on the protective order filing.
Johnson stressed that victim protective orders are designed to provide legal protection when someone believes another person poses a threat to their safety.
“Victim's protective act is there for a reason. We're there to protect people in a situation where they may feel unsafe by someone in any space,” Johnson said.
Information about Oklahoma protective orders and the process for seeking one is available through the Oklahoma State Courts Network.
The Oklahoma County deputy stalking case now proceeds through the criminal court system while Oklahoma City police continue handling the investigation independently of Vu's former employer.
The allegations contained in the protective order and criminal case remain allegations. Vu has been charged with one count of felony stalking, but he has not been convicted, and prosecutors will have to prove the charge in court.
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