Lindsay Clancy Trial: Her Apple Watch Just Told the Jury Everything

Lindsay Clancy, 34, of Duxbury, Massachusetts, is standing trial on three counts of murder and three counts of strangulation after prosecutors allege she killed her three children — 5-year-old Cora, 3-year-old Dawson, and 7-month-old Callan — with exercise resistance bands inside the family’s Summer Street home on January 24, 2023. She’s pleaded not guilty. Her attorney, Kevin Reddington, is mounting an insanity defense, arguing severe postpartum psychosis and psychiatric overmedication.
Today the jury didn’t hear from a witness who was in the house. They heard from her phone.
Digital evidence examiner Ian Whiffin walked the court through what he pulled from Clancy’s iPhone and Apple Watch — tools he built himself, because apparently off-the-shelf software doesn’t cut it when a device update can quietly change what’s recoverable. The data shows her heart rate swinging between 50 and 122 beats per minute on the day her children died, before the devices stopped logging her vitals at 5:23 p.m. Prosecutors also walked him through “flight climb” data — recorded on both devices with mismatched timestamps — and search history that included postpartum psychosis symptoms and depression medications.
On cross, Whiffin conceded Apple Health isn’t gospel — it misfires sometimes — and confirmed the trail goes dark after 5:38 p.m. Reddington then zeroed in on something harder to explain: device activity logged for January 25th, while Clancy was unconscious in a hospital bed. Whiffin’s answer, on redirect, was procedural — the phone syncs with the watch, he can’t pull data from the watch directly, and if police handled either device, the phone would record that too.
After the killings, Clancy allegedly attempted suicide by jumping from a second-story window and is now paralyzed from the waist down. Her husband, Patrick Clancy, was out running errands when it happened and has since relocated to Manhattan. The trial continues in Plymouth Superior Court.
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