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cyberyark
^This may give more details.
Update:
Crash investigator Edward Small studied CCTV of the collision which was shown frame-by-frame in court.
He told jurors Alliston was seen in the footage beginning to swerve to take evasive action as he approached the pedestrian.
He was a minimum of between 6.65 and 9.65 metres away from Mrs Briggs and travelling at an average speed of 18mph, jurors were told.
Mrs Briggs stepped into the road 3.8 seconds before the crash, Mr Small said.
The investigator also carried out tests comparing the stopping distances of a police issue mountain bike, Alliston's Planet X bike and a fixed wheel bike adapted with front brakes.
The court heard that Alliston was doing between 10mph and 14mph as he tried to avoid the collision.
Mr Small concluded that if Alliston had front brakes on his bike, he would have been able to stop before the point of impact.
Jurors were also told that, after the crash, the defendant changed the wheels on his bike but the original set was later retrieved by police.