A 27-year-old man from Oklahoma is facing charges for allegedly murdering his former girlfriend by shooting her in the back of the head while she was holding their 5-year-old son. The incident occurred during an early morning argument on Easter, after which he reportedly fled the state.

Connor Allen Kinnamon was apprehended in Kansas and now faces a charge of first-degree murder for the death of 27-year-old Audrey Adams, according to court documents.

Investigators revealed that prior to the shooting, the couple had engaged in a heated verbal dispute, escalating to a minor physical altercation, as reported by Cushing, Oklahoma’s AM radio station KUSH 1080. The conflict was intense enough that Kinnamon’s mother had to step in to separate them, according to a probable cause affidavit.

Tensions rose further when Adams contacted her mother to come pick her up, which reportedly aggravated Kinnamon, police noted.

At the time of the incident, several family members were present in the residence.

According to the affidavit, “Connor was positioned just inside the dining area facing the front door. Audrey was holding their son in her arms.” The victim’s mother urged Audrey to leave with her, at which point Connor reportedly made a remark about shooting himself before drawing a gun and shooting Audrey, causing her to collapse immediately in the living room.

Emergency Medical Services personnel responded shortly after and attempted lifesaving measures, but Adams was pronounced dead at 2:47 a.m.

Immediately after the shooting, police said Kinnamon ran from the residence through the back door, taking his mother’s Buick Regal and driving from the scene.

In a motion seeking to have Kinnamon held without bond, prosecutors wrote that he shot Adams “in the back of the head” and later confessed to killing her.

Family members reacted quickly, with Adams’ mother grabbing the couple’s young child while Kinnamon’s mother called 911 and informed the dispatcher her son had fled in her vehicle, Oklahoma City CBS affiliate KWTV reported.

Investigators tracked Kinnamon across state lines by pinging his cellphone and were able to speak with him and talk him into stopping the vehicle.

“Numerous pings indicated that Connor was northbound toward the Kansas state line, eventually crossing into Kansas,” the affidavit said, adding that a deputy was able to contact Kinnamon by phone and negotiate his surrender as law enforcement coordinated the stop.

A firearm believed to have been used in the killing was later recovered.

“The Sumner County Sheriff’s Office secured the Buick Regal and located the suspected firearm used in the shooting inside the vehicle,” according to the affidavit. A single spent 9 mm casing was also found inside the home.

The couple’s son was not physically harmed in the shooting, police said. Authorities also noted that in an interview with detectives, Kinnamon said he and Adams had used methamphetamine in the hours before the shooting, though toxicology results are still pending.

Kinnamon is being held in the Payne County Jail without bond, court records show. He is currently scheduled to appear in court again for a preliminary hearing on May 4.