Joseph Ayer, 30, was the driver of a motorcycle that crashed in March on Route 400 in West Seneca with Olsen on board.
West Seneca police said Ayers was traveling at 90 miles an hour and weaving in and out of traffic when the crash occurred. Olsen was pronounced dead at the scene.
Ayer will face up to 4 years in prison when he's sentenced Nov. 8.
Cheektowaga man pleads guilty in motorcycle fatal
- Cynthia Brown, activist headed Human Rights Watch group
- Ex-Argentine dictator Jorge Rafael Videla dies at 87
- Mary Ardelle Pitkin, 96, longtime French teacher
Activist Cynthia Brown, who played pivotal role at Human Rights Watch for years, dies in NYC