Expert Witness Journal Issue 67 June/July 2026 - Flipbook - Page 61
For insurers and lawyers dealing with such cases it is
advisable to request the involved parties obtain both
the FIT and GPX 昀椀les from their online account.
Depending on the platform, export options may not
be clear, and if that is the case it is worth seeking
early advice from experts with speci昀椀c experience
in processing and analysing this data. It is always
helpful to seek this advice as soon as possible as the
device itself may also contain useful data.
with Hampshire and the Isle of Wight Constabulary,
complemented by road safety research undertaken
whilst working at the Transport Research Laboratory.
Her expertise includes collision reconstruction,
CCTV analysis, Advanced Driver Assistance Systems
(ADAS), and injury biomechanics. She has prepared
evidential reports and provided expert evidence in
Coroner’s Court and the Crown Court.
Steven Mairs is a Chartered
Engineer and Member of the
Institution
of
Mechanical
Engineers with a First-Class
Master’s (Hons) degree in
Mechanical Engineering from
Queen’s
University
Belfast.
He
He has extensive experience
as a collision investigator,
specialising in the forensic reconstruction of road
tra昀케c collisions. His expertise includes scene
examination, vehicle and component analysis, and
interpretation of digital evidence such as CCTV,
tachograph data, and event data recorders. Steven is
a registered Bosch Crash Data Retrieval analyst and
has acted as an expert witness in Magistrates’ and
Crown Courts and at Coroners’ Inquests.
References
Garmin (n.d.) FIT SDK Overview. Available at: https://
developer.garmin.com/昀椀t/overview/
Strava (2026a) How Distance is Calculated. Available at:
https://support.strava.com/hc/en-us/articles/216919487-HowDistance-is-Calculated
Strava (2026b) Exporting your Data and Bulk Export. Available
at: https://support.strava.com/hc/en-us/articles/216918437
Exporting-your-Data-and-Bulk-Export
About the authors
Siobhan O’Connell is a forensic
collision investigator specialising
in the reconstruction of serious
and fatal road tra昀케c collisions.
She holds a First-Class Master’s
(Hons) degree in Medical
Engineering from Engineer
the University of Surrey and has
practical investigative experience from her time
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EXPERT WITNESS JOURNAL
59
JUNE 2026
