The cyclist whose collision with a CBS executive's wife ultimately led to her death is believed to have top ratings on a fitness app which allows users to race each other. Jason Marshall, 31, who hit 59-year-old Jill Tarlov while she was walking through Central Park last Thursday, is said to be an avid user of Strava, a service which allows riders to challenge one another and share their locations via GPS. It has a ranking system where cyclists can record their times over 2.5million different routes in a bid to become KOM - or King Of The Mountain - or complete various 'achievements'.
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Jason Marshall crashed into Jill Tarlov while riding through Central Park
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She was left brain dead by the collision and died on Monday
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Marshall, 31, is said to be an avid user of the racing app called Strava
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It uses GPS so riders can race each other over stretches of road
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The saxophonists had completed four 'fastest time achievements' in New York before the tragic collision
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There have been two lawsuits associated with the app in the last four years
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Marshall has not been charged with any crime but police are still investigating the incident
Victim: @placeholder, pictured, suffered severe head injuries during the crash last Friday and died in hospital on Monday.