A 47-year-old Oklahoma City man accused of opening fire at a northwest-side apartment complex and killing a 30-year-old last November is set to face a judge next month. Prosecutors say Allen Sioux is responsible for the Nov. 17, 2025, shooting that claimed the life of Mark Dewayne Clewis Jr., and his formal arraignment is scheduled for May 27.
Officers were dispatched around 3:39 a.m. on Nov. 17 to an apartment complex in the 7100 block of Melrose Lane, near Rockwell Avenue. There, they found 30-year-old Mark Clewis Jr. suffering from a gunshot wound. He was rushed to a nearby hospital, where he died later that day. According to the Oklahoma City Police Department, the case is listed as Homicide #63 of 2025 and remains under active investigation.
Detectives later identified 47-year-old Allen Sioux as the suspect in the shooting. Investigators say Sioux left the scene but was arrested the next day in southwest Oklahoma City and booked into the Oklahoma County Detention Center on a murder complaint, as reported by KOCO.
Sioux is now formally charged with first-degree murder and accused of being a felon in possession of a firearm. His arraignment on those charges is set for May 27, according to KOKH.
Court Timeline and What Comes Next
At the arraignment hearing, a judge will read the charges and ask Sioux to enter a plea. Prosecutors can also argue for continued detention or specific bond conditions based on the evidence and the seriousness of the allegations. If the charges are allowed to stand, the case will move into preliminary hearings and then the broader pretrial calendar in Oklahoma County District Court.
During that phase, both sides will have chances to dig in. Defense attorneys and prosecutors can file pretrial motions, request and review discovery, and argue over what evidence the jury will eventually be allowed to hear. Only after those steps are complete would a trial date be set.
Legal Stakes and Possible Penalties
Under Title 21 of the Oklahoma statutes, murder in the first degree is a Class Y felony that can be punished by death or life imprisonment, while weapon-related charges can bring additional prison time. As outlined in Title 21 and summarized by Justia, offenses such as possession of a firearm by a convicted felon or possessing a weapon while committing a felony can significantly increase a defendant's overall sentencing exposure.
How the Public Can Help
Oklahoma City police are asking anyone who might know more about what happened in the early-morning hours of Nov. 17 to come forward. Tips can be directed to the department's homicide tip line at 405-297-1200. The police news release lists SSgt. Dillon Quirk as a public information contact.
Tips can be submitted anonymously through the homicide tip line. The investigation is still unfolding, and additional court filings and the May 27 arraignment are expected to reveal more about what led up to the shooting and how prosecutors plan to pursue the case against Sioux.
