Watch the video on YouTube: The Horrifying Case of Harmony Montgomery — That Chapter
That Chapter's Harmony Montgomery Video: Two Missing Years and the Stories That Did Not Hold
Harmony Montgomery was last seen in Manchester, New Hampshire, in late 2019. She was five years old. No one reported her missing until late 2021 — and when police went looking for the last person she had been with, her father Adam Montgomery, he told them a variety of stories about where she was and insisted she was alive. That Chapter's 55-minute account follows what a different version of events revealed.
That Chapter, Mike's channel with 2.29 million subscribers, is at its strongest on contained cases with a clear timeline, and this one needs exactly that discipline. The video, published on July 8, 2025, has drawn 2,621,979 views. It has a long chronology to hold together — a custody decision in Massachusetts, a disappearance in New Hampshire, a two-year gap in which no agency established where Harmony was, and then a murder trial built without her remains ever being found.
The tone matters here more than in most entries in this series. This is a case about a small child and about systems that were supposed to notice her. The video treats it that way, and this review follows the same approach: the focus is on the timeline, the evidence presented in court, and the questions the case still leaves open.
At a Glance
| Video | “The Horrifying Case of Harmony Montgomery” |
|---|---|
| Channel | That Chapter |
| Published | July 8, 2025 |
| Length | ~55 minutes |
| Views | 2,621,979 |
| Subject | The 2019 disappearance of Harmony Montgomery in Manchester, New Hampshire; the investigation and her father's trial |
What the Video Covers
The video opens with the realisation that frames the whole case: police learned Harmony had not been seen in about two years. Her mother, Crystal Sorey, reported her missing in November 2021. Harmony had been placed in her father's custody by a Massachusetts judge in February 2019, and she was last seen in Manchester in the autumn of that year, around the family's eviction from a home on Gilford Street on November 27, 2019. Investigators later narrowed the window of her disappearance to roughly November 28 to December 10, 2019, while the family was living out of vehicles.
The middle section follows the search for Adam Montgomery and the accounts he gave. As the video's own summary puts it, he offered varying stories about where Harmony was and maintained that she was alive — including that she had gone to live with her mother in Massachusetts. The investigation tested those accounts against witnesses who had seen Harmony in late 2019, and then not seen her, and against the testimony that eventually came from her stepmother, Kayla Montgomery. Prosecutors argued at trial that Adam killed Harmony in early December 2019; Kayla testified for the prosecution as part of a plea agreement after earlier pleading guilty to perjury for lying to a grand jury about Harmony's whereabouts.
The final section covers the trial in Manchester in February 2024. The defence argued Kayla, not Adam, was responsible for Harmony's death and that Adam had only concealed it. On February 22, 2024, a jury convicted Adam Montgomery of second-degree murder, along with second-degree assault, abuse of a corpse, falsifying physical evidence and witness tampering. He was sentenced that May to 45 years to life for the murder, within a total of 56 years to life, to be served consecutively to an earlier sentence for unrelated firearms offences. Harmony's remains have never been recovered — a fact the video returns to at the close, because it is the unresolved centre of the case for her family.
Strengths
The two-year gap is explained, not just asserted. The most common question in this case — how does a five-year-old go unreported for two years? — is also the hardest to answer responsibly. The video works through the custody transfer, the move between states, the eviction, and the failed checks in sequence, so viewers can see how each step made the next gap easier, rather than being left with a single villain or a single missed call.
Harmony stays at the centre. Cases built around a defendant's shifting stories can easily become stories about the defendant. This one keeps returning to Harmony herself — her age, her partial blindness in one eye, and the people, including her mother and her former foster family, who kept trying to find her. That restraint is appropriate to the subject and it is sustained.
A complete trial arc, clearly separated. The video distinguishes what Adam Montgomery said, what Kayla Montgomery testified, what prosecutors argued, and what the jury actually decided. In a case with no recovered remains and a central witness testifying under a plea agreement, keeping those categories separate is not a nicety — it is what makes the account trustworthy.
Weaknesses
The ending is no longer the final legal position. The video was published in July 2025 and ends with the 2024 conviction. On June 11, 2026, the New Hampshire Supreme Court reversed the second-degree murder conviction, ruling that the assault and murder charges should not have been tried together; the other convictions stood, Montgomery remains in prison, and the state said it would pursue a retrial on the murder charge, according to Associated Press and USA Today reporting. Viewers should watch the verdict section knowing that development is still to come.
The central testimony carries its own complications. The only direct account of Harmony's death presented at trial came from a witness who had previously lied about the case under oath and testified under a plea deal. The video presents that context, but viewers who want the fuller argument about how the jury was instructed to weigh it will need the trial reporting alongside it.
Some questions have no answer on screen. Because Harmony's remains have never been found, the video cannot close the most basic question her family faces. That is a limit of the case itself, not of the telling — but it does mean the final minutes land as an open file rather than a resolution, despite the trial coverage.
Who Should Watch
- That Chapter regulars — a longer, more sombre entry than the channel's usual case, handled with appropriate restraint.
- Viewers interested in how cases fall through systems — the custody, interstate, and welfare-check failures are as central here as the criminal investigation.
- Trial-focused viewers — a murder prosecution built without recovered remains, with the evidence and the defence theory laid out separately.
- Anyone following the case now — watch this for the full background, then read the June 2026 reporting for the retrial development the video predates.
8/10
A careful, victim-centred account of a difficult case — the two-year gap is explained step by step, the trial evidence is kept in its proper categories, and Harmony stays at the centre throughout. Its only real limit is time: the 2024 conviction it ends on was reversed on procedural grounds in June 2026, with a retrial planned.
Source: That Chapter on YouTube (“The Horrifying Case of Harmony Montgomery,” published July 8, 2025); case background via Associated Press and USA Today reporting on the 2024 trial and the June 11, 2026 New Hampshire Supreme Court ruling.