MUS-2026-0360
Archive card
MUS-2026-0360
Missing person
- Incident
- 1999
- Indexed
- Oct 20, 2026, by MuseUnsolved
- Agency
- York Regional Police
- Location
- Newmarket ON
Public record. Index entry.
Index entry. Case details compiled from public reporting; our researchers have not verified this file yet.
Summary
What happened, as the record shows.
Tammy Lamondin-Gagnon, a 20-year-old Ojibwe woman, vanished on May 29, 1999 in Newmarket, Ontario, after being dropped at Fairy Lake Park around 2 a.m. The last person to see her alive died by suicide before a third police interview. As of 2021 the disappearance is treated as a cold case. No arrests were ever made.
Timeline
What the record establishes.
- 1999
Tammy Lamondin-Gagnon, 20, is dropped at Fairy Lake Park around 2 a.m. and is never seen again.
- 2021
The disappearance is treated as a cold case by the York Regional Police homicide unit; no arrests have been made.
- 2026
She was never found. The case remains unsolved.
Key people
The people in the file.
20, of Newmarket, Ontario. Vanished May 29, 1999 after being dropped at Fairy Lake Park around 2 a.m.
Contact details change over time; confirm the current assignee before publishing.
Investigating agency
Where tips go.
This case is with the York Regional Police. If you know something, say something to them. For public-record leads for our researchers, use the tip line on any open file.
Coverage
Coverage and further reading.
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