The 13-year murder saga of Katelyn Markham, which ended with her boyfriend’s conviction in July after he pleaded guilty, will be repeated on Friday, September 27 on Dateline NBC.

The station will devote two hours (9:00-11:00 p.m.) to Markham, a 21-year-old student at the Art Institute of Ohio in Cincinnati who disappeared from her Fairfield home in August 2011. Her remains were found in 2013 in a wooded area in Cedar Grove, Indiana, about 20 miles west of Fairfield.

Her fiancé, John Carter, was arrested in March 2023 — nearly 10 years after her remains were found — and charged with two counts of murder. Shortly before his trial in June, Carter, 36, pleaded guilty to one count of involuntary manslaughter in Butler County Common Pleas Court after denying for 13 years that he had anything to do with her death. He was sentenced July 18 to three years in prison, the maximum sentence allowed under a plea agreement.

Former WCPO-TV reporter and anchor Andrea Canning reports, Line date story featuring interviews with Dave and Ally Markham, Katelyn’s father and sister, investigator Paul Newton and WLWT-TV reporter Karin Johnson.

In a promotional video for the show, Canning says that while “Fairfield police have stepped up their search efforts, Katelyn’s fiancé has been there talking to anyone he can” after she went missing. It includes news footage of Carter saying, “Katelyn is the love of my life. We’ve been engaged for a year.”

NBC’s episode description reads: “The Season 33 premiere of Dateline examines the case of a young Ohio woman who disappears one summer night, prompting a massive search for her community. When she is found dead, investigators interview her friends and family to uncover her killer.”

On Friday at 7:30 p.m., WLWT-TV will begin broadcasting Access to Hollywood to air a half-hour special on the Markham case, according to Johnson.

“We will take you into an interview room. You will hear some of John Carter’s conversations from jail. The Butler County District Attorney’s Chief Investigator and the District Attorney’s Criminal Investigator will walk you through their investigation. You will also hear for the first time from the first Fairfield police officer who arrived at Katelyn’s home the night John called 911. She has never spoken publicly about her observations and what she calls the “mistakes” in the initial investigation until now,” Johnson wrote on Facebook Wednesday.

Markham’s death was ruled a homicide, but authorities have not been able to determine how she was killed, according to the Associated Press. Her remains were found on land near a farm owned by the Carter family, according to the Journal-News, a Butler County daily.

Carter and Markham planned to move to Colorado in late 2011, after she graduated from college.

Butler County prosecutors said Carter caused Markham’s death “during an assault at her Fairfield home in August 2021,” Johnson reported on WLWT-TV in June.

Carter did not speak during the sentencing hearing led by Judge Daniel Haughey. Prosecutors said after the verdict was announced in July that Carter did not explain how or why he killed Markham, according to the AP.

Dave Markham has been a strong advocate for his daughter’s case since her disappearance, giving numerous television and newspaper interviews to pressure investigators to solve her murder when the case was brought to the Butler County Sheriff’s Office in 2015 and to the Butler County Prosecutor’s Office in 2020. He also attended Carter’s court hearings in June and July.

As WLWT-TV’s Johnson reported after Carter’s guilty plea, he was the prime suspect all along for Butler County Sheriff’s Office investigators.

“(The investigation) eliminated 20 persons of interest, either through polygraphs or alibis, who were persons of interest in this case. There was no question … who was responsible for her disappearance and death,” Butler County Sheriff’s Sergeant Rob Whitlock told Johnson in June.