What RedFlag saw in Chris Watts' 2018 porch interview
← All articles · By the RedFlag team · September 26, 2026
On August 14, 2018, a day after his pregnant wife Shanann and daughters Bella and Celeste were reported missing from their home in Frederick, Colorado, Chris Watts spoke to Denver7 on his porch and said he wanted them back. RedFlag is not a lie detector — it measures where a speaker's voice and face diverge from their own baseline and leaves the interpretation to you.
The public record is settled. Watts was arrested the next day, confessed, and in November 2018 pleaded guilty to the murders of Shanann, Bella and Celeste and their unborn son, Nico. He is serving life without parole. We publish this analysis with respect for the victims; it examines only what is measurable in the recording.
The analyzed video
RedFlag's analysis of the clip. The screen turns red during flagged moments, a green bar marks stretches within normal range, and the counter climbs as each flag is caught.
Overlay rendered from the analyzer's own output for this clip (same pipeline as the app's capture mode). Original clip: YouTube ↗.
What RedFlag flagged
Across the clip, RedFlag flagged 11 moments totalling 2 minutes 47 seconds. Each flagged episode lasts at least 3 seconds; shorter blips are dropped as measurement noise.
| # | Timestamp | Length |
|---|---|---|
| 1 | 0:13 – 0:39 | 26s |
| 2 | 0:50 – 1:19 | 30s |
| 3 | 1:24 – 1:36 | 12s |
| 4 | 1:43 – 2:03 | 20s |
| 5 | 2:24 – 2:33 | 9s |
| 6 | 2:43 – 2:47 | 4s |
| 7 | 3:01 – 3:09 | 8s |
| 8 | 3:27 – 4:01 | 34s |
| 9 | 6:17 – 6:32 | 15s |
| 10 | 6:42 – 6:48 | 6s |
| 11 | 7:13 – 7:18 | 6s |
What the signals did
| Signal | Flagged moments | Rest of the clip |
|---|---|---|
| Pitch variability (F0 semitone SD; normal band 2.3–4.5) | 1.74 st | 2.93 st |
| Blink rate | 15.27/min | 13.68/min |
| Voiced continuity | 0.4 | 0.35 |
The flags are driven mainly by his voice. During the flagged moments Watts' pitch variability averaged 1.74 semitones against 2.93 in the rest of the interview — an unusually flat delivery, below the 2.3–4.5 band typical of engaged conversation, while he was describing his family's disappearance. His voiced continuity was higher (0.40 vs 0.35) and his blink rate ran about 12% above his own baseline (15.3 vs 13.7 per minute). RedFlag's verdict is pitch-anchored, with blink and voicing changes relative to the speaker's own baseline adding weight; thresholds are public in the scoring method.
What this does and does not mean
It does not mean the analyzer detected a lie. Flattened pitch, blink changes and unusual voicing all have innocent causes — rehearsal, fatigue, a hostile room, a hard question. The honest reading is narrower: at these moments, this speaker's delivery deviated from his own baseline in a measurable, repeatable way. What that meant is a judgment, and here the public record has already made it.
Run your own. Paste any public YouTube interview with a single speaker into the analyzer — free, no signup, in your browser. RedFlag charts the signals; what they mean stays your call.
Open the analyzerSources
- Analysis run: RedFlag analyzer (capture pipeline), September 2026, on YouTube ugoYkx04E2Q. Figures are the analyzer's own per-slot output.
- Watts' November 6, 2018 guilty plea and November 19, 2018 sentencing (summary ↗).
- Original footage: Denver7 (KMGH-TV), raw interview.
- Scoring method and thresholds: How RedFlag scores a video.