In an emotional account in court Thursday, Heather Boyum's cycling partner provided new details of the fatal accident that resulted in tragedy last summer.
Marie Boudreau-Ninkov, 51, was training for a triathlon with Boyum. She said the two women planned a 30-mile bike ride followed by a run on the morning of July 29, 2012.
They left Boyum's house and rode side by side until reaching Route 250 in Penfield. At that point, Boyum pulled in front to lead the way in the right shoulder.
"It was the biggest shoulder I'd ever ridden on," said Boudreau-Ninkov, who was not an experienced cyclist. "I felt safe because it was so big and there was no traffic."
Soon after the women passed the Eastside YMCA, the bikers heard the sound of a motorcycle approaching from behind.
Mark Scerbo then passed in front of Boudreau-Ninkov from the left.
She saw Boyum turn to look behind and scream.