Keith Morrison

At 4.48 a.m., 28 minutes after the white car left King Road, FBI records show a cell phone turned on south of Moscow and hit a cell tower that covered an area west of Blaine, Idaho, a phone that records show was tied to Brian Kohlberger.

At 4.48 a.m., 28 minutes after the white car left King Road, FBI records show a cell phone turned on south of Moscow and hit a cell tower that covered an area west of Blaine, Idaho, a phone that records show was tied to Brian Kohlberger.

The signal moved west, and 32 minutes later at 5.20 a.m., the phone hit a tower near Johnson, Washington, until finally at 5.39 a.m., the phone connected to a tower covering the west side of Pullman, Washington. And it was in Pullman, records obtained by Dateline show, that a call was made from that phone, linked to Brian Koberger, using a tower not far from his apartment.

The signal moved west, and 32 minutes later at 5.20 a.m., the phone hit a tower near Johnson, Washington, until finally at 5.39 a.m., the phone connected to a tower covering the west side of Pullman, Washington. And it was in Pullman, records obtained by Dateline show, that a call was made from that phone, linked to Brian Koberger, using a tower not far from his apartment.

The time was 6.17 a.m., nearly two hours after the killer sped away from the murder scene. The call lasted 36 minutes. Two, a phone in Pennsylvania registered to Brian Koberger's father. It appears that several family phones, including his mother's, are on the same account.

The time was 6.17 a.m., nearly two hours after the killer sped away from the murder scene. The call lasted 36 minutes. Two, a phone in Pennsylvania registered to Brian Koberger's father. It appears that several family phones, including his mother's, are on the same account.

In fact, records show that call was the first of three calls Koberger made to the phone registered to his father that morning. The longest call lasted 54 minutes. We reached out to the family for comment, but we didn't hear back. Meanwhile, back on King Road, by 7.30, three hours after the murders, Bethany was awake and calling her dad. By 8.05 a.m., Dylan was, at least briefly, back on Instagram.

In fact, records show that call was the first of three calls Koberger made to the phone registered to his father that morning. The longest call lasted 54 minutes. We reached out to the family for comment, but we didn't hear back. Meanwhile, back on King Road, by 7.30, three hours after the murders, Bethany was awake and calling her dad. By 8.05 a.m., Dylan was, at least briefly, back on Instagram.

And at times throughout the morning, she continued to reach out to her roommates by text and on social media apps. Still, no answer. Just after 9 a.m., record show Brian Koberger's phone was briefly back in Moscow and not far from the crime scene for about nine minutes before returning to his apartment, where at 10.31 a.m. he took this selfie in his bathroom mirror.

And at times throughout the morning, she continued to reach out to her roommates by text and on social media apps. Still, no answer. Just after 9 a.m., record show Brian Koberger's phone was briefly back in Moscow and not far from the crime scene for about nine minutes before returning to his apartment, where at 10.31 a.m. he took this selfie in his bathroom mirror.

The prosecutors released it seven weeks ago. Reaction was immediate and worldwide, much like this.

The prosecutors released it seven weeks ago. Reaction was immediate and worldwide, much like this.

And an hour after that selfie was snapped, records show that Brian Coburger's cell phone hit a tower serving the towns of Clarkston and Lewiston, 34 miles south of Pullman. Police theorize he could have been disposing of evidence, a knife perhaps, or possibly clothes worn during the killings. And then there's a river down there near Lewiston, so.

And an hour after that selfie was snapped, records show that Brian Coburger's cell phone hit a tower serving the towns of Clarkston and Lewiston, 34 miles south of Pullman. Police theorize he could have been disposing of evidence, a knife perhaps, or possibly clothes worn during the killings. And then there's a river down there near Lewiston, so.

Back in Moscow, midday was approaching. More than seven hours after the murders, neither Bethany nor Dylan had called 911.

Back in Moscow, midday was approaching. More than seven hours after the murders, neither Bethany nor Dylan had called 911.

Dylan's story? As court records show, at about 11.50 a.m., frightened, she called a friend and asked her to come over. The friend brought her boyfriend, and he and Dylan and Bethany started to walk up the stairs. When they reached the second floor, she said she saw Zanna again for a split second, started bawling, and thought Zanna, quote, "...was still just drunk and all asleep on the floor."

Dylan's story? As court records show, at about 11.50 a.m., frightened, she called a friend and asked her to come over. The friend brought her boyfriend, and he and Dylan and Bethany started to walk up the stairs. When they reached the second floor, she said she saw Zanna again for a split second, started bawling, and thought Zanna, quote, "...was still just drunk and all asleep on the floor."

but the boyfriend had apparently seen more. He told Bethany and Dylan to get out. He was pale white. Told them to call 911, she said, and mentioned something about someone being unconscious. Bethany dialed 911 at 11.56 a.m.

but the boyfriend had apparently seen more. He told Bethany and Dylan to get out. He was pale white. Told them to call 911, she said, and mentioned something about someone being unconscious. Bethany dialed 911 at 11.56 a.m.