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251 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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In the quiet town of Gill, Massachusetts, a deeply concerning mystery began to unfold on March 29, 2022. On that Tuesday, 29-year-old Mateusz Koziol was seen for the last time. His sudden disappearance would leave his family, friends, and the local community with a void of unanswered questions and a lingering sense of unease. The circumstances surrounding his last known moments were centered around the French King Bridge, a location that would become the focal point of the initial investigation ...Read More
Last Seen: Mar 29, 2022

Victim Details

Mar 03, 2023

Jan 18, 2024

Mateusz

Koziol

31

29

67 inches

68 inches

140 lbs

160 lbs

White / Caucasian

Male

Mar 29, 2022

Gill

Massachusetts

Franklin County

01354

No

123620

Massachusetts State Police - Northwestern District Attorney's - Franklin County Office

Greenfield

Massachusetts

Franklin County

01301

56 Bank Row, Massachusetts

4137743186

State

Law Enforcement

2022-109-199

2022-03-29

Massachusetts State Police - Northwestern District Attorney's - Franklin County Office

2577

Black

Brown

Brown

No

06/01/2026


Area Last Seen: