Just hours before the Idaho murders, another grisly scene unfolded outside Bryan Kohberger's window

• On the night of the Idaho killings, the police responded to a crash in front of the suspect's home.
• The crash, which happened in Washington, resulted in two pedestrians being sent to a hospital.

Throughout Bryan Kohberger's journey to Moscow, Idaho, and back home to Pullman, Washington, police and sheriff's deputies spent hours in front of Kohberger's home responding to a "horrifying" hit-and-run.

Kohberger, a graduate student accused of killing 21-year-old Kaylee Goncalves, 21-year-old Madison Mogen, 20-year-old Xana Kernodle, and 20-year-old Ethan Chapin, lived in a campus apartment near Washington State University, where he studied criminology.

Data pulled from Kohberger's cellphone revealed that he traveled to the house where the murders occurred no fewer than 12 times. And on the night the murders occurred, he traveled there once again, the data shows.

Hours before his travels, Washington State University police officers and Whitman County sheriff's deputies arrived in front of his home to respond to a different bloody crime scene.

The crash was reported at 11:40 p.m. on November 12 — three hours before Kohberger left his home for Idaho — and resulted in two pedestrians being sent to the hospital with serious injuries.

Turner Gardner, 26, told Insider that a man had been thrown from the road and a woman lay face-down screaming.

"It was horrifying," she said of coming upon the scene just before midnight on November 12.

"I heard a screech and a loud bang," another witness, Aundrea McKinsey, 25, told Insider. "It was scary."

The police eventually took a 19-year-old Kappa Delta sorority member named Carmen E. Fernandez into custody following a manhunt and charged her with vehicular assault and DUI, according to police and news reports.

There's a chance Kohberger witnessed the crash before leaving his apartment at 2:42 a.m. on November 13, according to cellular data and traffic-camera footage. Cellular data indicates he was at home during the crash and could hear and see the street from a second-story window. Neighbors and court documents have described Kohberger as an insomniac.

After the crash, in the early hours of Sunday, Kohberger drove in his white Hyundai sedan 11 miles to Moscow, according to cellphone and traffic data.

The police response to the hit-and-run blocked the most direct way to Kohberger's home, one of only two ways to access his apartment building. The route that was open that night requires turning four times on residential streets and going over four speed bumps before connecting with a main road. The route the police blocked had one turn and one speed bump.

Prosecutors allege he then committed the grisly killings, leaving behind a knife sheath containing the DNA that would eventually lead to his arrest on charges of first-degree murder.

By 5:30 a.m., cell-tower pings showed his phone back at his home. Witnesses said the police were still on his street responding to the crash.

Kohberger again left his apartment at 9 a.m., traveling to the scene of the murders before returning home, prosecutors allege.

Once more, at noon — when the Moscow police commenced their hunt for the killer — Kohberger's phone pings indicate he likely slipped out of his apartment and past the Pullman police once more.

While authorities had no reason to believe four people had been murdered in the neighboring town with its own police force, it's unclear whether the crash had anything to do with the killings or it was a simple coincidence.

"It makes you wonder if things could have been different," Faith Grossi, 19, told Insider, standing in a student room with a window facing the hit-and-run scene and Kohberger's apartment.