A tragic incident has rocked Nebraska, leaving a couple and their unborn child dead, while law enforcement has apprehended another couple for their alleged involvement in the crime. The Lincoln Police Department has charged 24-year-old Sterling James with two counts of first-degree murder for the deaths of Hannah Neville, aged 26, and Roberto Tanner, aged 27. Meanwhile, James’ wife, Sayde Titus, aged 22, faces two counts of aiding and abetting.

The somber chain of events traces back to mid-January when Hannah Neville was declared missing. She was last seen in or around Stromsburg, a small town nestled approximately 65 miles northwest of Lincoln. As days passed, hopes for her safe return began to dwindle.

By late January, the situation took a grim turn when the Nebraska State Patrol discovered Neville’s SUV, abandoned and in a severely deteriorated condition, in Lincoln. This discovery came a full ten days after her cellphone had last signaled its presence near the city along Interstate 80, dampening hopes for a positive outcome.

Authorities reported that Neville, who was traveling with Tanner, was last seen carrying a “light blue Nike backpack” and had missed important medical appointments related to her pregnancy. This information was part of an Endangered Missing Advisory issued on January 29.

The vehicle was located on a cul-de-sac near the intersection of 39th Street and Cornhusker Highway, found “engulfed in flames” with its interior “severely damaged,” according to the Polk County Sheriff’s Office. The chilling discovery left the community in shock and mourning, as questions about the motive and circumstances of the crime continue to loom large.

The vehicle was found on a cul-de-sac near the intersection of 39th Street and Cornhusker Highway “engulfed in flames” and the interior “severely damaged,” according to the Polk County Sheriff’s Office.

At the time of her disappearance, the victim was 32 weeks pregnant, police said. Authorities later identified Tanner as her husband.

People who knew Neville grew concerned after she missed appointments because she had never done so before and was “excited and elated” about being pregnant, the sheriff’s office said, according to Omaha-based ABC affiliate KETV.

This week, the sheriff’s office reported that that missing couple are now believed to be dead, according to an updated press release.

On Monday, the police department said officers are working to locate the bodies, according to law enforcement sources cited by KETV.

On Jan. 15, Neville left Stromsburg to pick up her husband in Lincoln, police said. Witness statements and cellphone data placed the slain couple at the accused couple’s apartment just before 7 p.m. later that same night, according to law enforcement.

After that, Neville’s device left around 8 p.m and traveled to a different address in Lancaster County, where it remained until around 1:30 a.m., police said, again citing cellphone data. The victims then traveled to a few more locations the next day before their devices went offline.

On Jan. 16, the burning vehicle was found, though investigators only later realized who it belonged to. By the time police called Neville to ask her about her SUV, her phone was out of service, police said.

On Feb. 1, officers served a search warrant at the second residence where Neville’s cellphone pinged on the night she disappeared. There, several people were detained, according to police.

While no details regarding a motive or similar have been released, police say James admitted to shooting Neville and Tanner, ultimately killing their unborn baby in the process. The male defendant is believed to have then burned their bodies and set Neville’s vehicle on fire. Titus is alleged to have helped her boyfriend after the murders.

James is the half-brother of Tanner and Neville was his sister-in-law, police said.

The investigation is ongoing, according to law enforcement.

On Tuesday morning, the Saunders County Sheriff’s Office announced activity near a rural intersection. The Lincoln Police Department confirmed investigators are searching the area for the victims’ bodies in that location because Tanner previously lived nearby, according to Lincoln-based CBS affiliate KOLN.