A North Carolina man will spend the rest of his life behind bars for the “cold-blooded and calculated” murder of his ex-girlfriend in Virginia.

In April, a Bedford County jury found 31-year-old Trenton Frye guilty of first-degree murder for the killing of 28-year-old Katlyn Lyon Montgomery, who was discovered strangled in her home in October 2022.

On Tuesday, 24th Judicial Circuit Judge James Updike Jr. sentenced Frye to life in prison — in excess of Old Dominion sentencing guidelines.

On October 7, 2022, Montgomery was found unresponsive in her apartment at the Jefferson Forest Manor Apartments in Forest, a designated area named after Founding Father Thomas Jefferson’s summer home. Although emergency responders rushed her to a hospital in Lynchburg, she died from her injuries the following day.

Investigators uncovered crucial evidence in Montgomery’s apartment, including phone charging cords wrapped inside a blanket on her bed. Search warrants obtained by Law&Crime shortly after the tragic event shed light on the investigation.

“[P]hysicians noted linear markings consistent with strangulation on her neck and throat,” one search warrant stated. “Law enforcement assessed that the cords seemed to match the linear markings found on the victim’s neck.”

The Bedford County Sheriff’s Office quickly “identified Frye as a recent ex-boyfriend.” Despite this, Frye attempted to create an alibi, claiming he hadn’t been in Virginia recently and was working in North Carolina instead.

Law enforcement quickly put the lie to those claims.

“A search warrant of his phone tower history revealed that he was in Bedford County the night of the incident,” a search warrant explains. “The tower his phone communicated with is within 1 mile of the victim’s address. The victim’s phone also has a record of an argument via text between Trenton Frye and herself over their recent break-up on the night leading up to this incident.”

Deputies learned Frye spent “several days” in the Lynchburg and Bedford County areas during the time period since the break-up and prior to the death of the beloved “loving” mother and “dancing queen.”

The defendant was arrested roughly two weeks later in North Carolina and extradited back to Virginia. Justice moved glacially for years.

On March 31, Frye’s trial began.

Out came the text messages — the defendant’s lies unfurled and punctuated with nasty, brutish and terse vindictiveness as the man came to realize the woman would not take him back.

“Lowlife, piece of s–,” Frye texted Montgomery after she denied his advances, prosecutors showed jurors. Another text reads: “karma is a b–” as Frye accuses Montgomery of “shady s—” and “toxic bs.”

Then came the pleas for sympathy.

“My mental issues are getting out of control,” he told his victim in another message, jurors learned. “Hurting like I never have before.”

Frye took the stand in his own defense to argue he was physically incapable of carrying out the crime the way the state said it happened.

“I could not have climbed the balcony without making a sound,” the defendant testified, according to a courtroom report by Roanoke-based CBS affiliate WDBJ. “I would have to be a ninja of some sort. To move an entire, what she described as a metal bench, put it on a concrete wall that was described, then put it on what looked like a fiberglass balcony, not break anything and not make a sound. How is that possible?”

This angle was a permutation of a belated admission that Frye was, in fact, at the apartment complex on the day in question. But, defense attorney Joseph Sanzone argued: “There’s no evidence that shows Trenton was ever in the apartment.”

Still, there was other evidence of Frye’s stalking and obsession.

Search warrants for the defendant’s Ford Explorer show deputies recovered several receipts, a purple hairbrush, black glasses, a car charger with two cords, three pairs of black pants, and two black shirts. Montgomery’s obituary notes that purple was her “favorite color” and asked loved ones to attend her funeral “wearing purple.”

Frye also searched for floor plans of the unit where Montgomery lived with her daughter and a roommate, prosecutors told the jury.

All the stalking, the state said, amounted to motive.

“His phone data and his lies, they all interact to prove his guilt,” Bedford County Commonwealth Attorney Wes Nance said, according to a courtroom report by The News & Advance.

In comments to Lynchburg-based ABC affiliate WSET after the verdict, the prosecutor again referenced the killer’s problems with the truth.

“From my perspective, I think his constant flow of lies to law enforcement played a big role, but we also wouldn’t have been here without the flow of digital evidence,” Nance said. “So, I think it’s a combination of those two things.”

During the sentencing hearing, Updike explained how a person in Frye’s position would typically be sentenced to 22-38 years in prison.

The judge, however, punished the killer far in excess of the sentencing guidelines – saying the woman’s murder was as “cold-blooded and calculated” as anything he had ever seen, according to WDBJ.