Police are investigating a Saw Mill Parkway motorcycle crash that left a Brooklyn man dead Monday.

Police say 23-year-old Christopher Robinson had just returned from a tour of duty in Iraq and was a corrections officer trainee at Bedford Hills Correctional Facility. According to investigators, Robinson was traveling south on the Saw Mill when he flew off his bike and struck the guardrail. First responders say his legs were severed by the impact.

Authorities believe speed may have been a factor, but they are still investigating the accident.