San Francisco Man Charged with Manslaughter and DWI in Fatal Crash Involving Renowned Cyclist

Federal prosecutors indict 81-year-old Arnold Kinman Low for the April collision that claimed the life of national bicycling champion Ethan Boyes.

Tragedy struck the cycling community in San Francisco this past spring when a fatal collision took the life of renowned cyclist Ethan Boyes. Now, federal prosecutors have charged an 81-year-old man, Arnold Kinman Low, with manslaughter and driving while intoxicated (DWI) in connection with the incident. The crash has sparked a renewed conversation about the need for safer streets and protected bike lanes in the city.

The Collision and Investigation

On April 4, 2023, tragedy unfolded in the Presidio area of San Francisco when Low, allegedly under the influence of alcohol, struck Boyes while driving through the federally-owned Presidio. The collision occurred on Arguello Boulevard just south of Washington Boulevard. The United States Park Police, responsible for investigating the incident, determined that Low’s intoxicated state led to the fatal crash. Boyes, a 44-year-old national bicycling champion, succumbed to his injuries shortly after being transported to a nearby hospital.

Remembering Ethan Boyes

Ethan Boyes was a highly accomplished cyclist, known as a USA Cycling Masters Champion and the holder of the national record in the “flying start” 500-meter time trial. His achievements in the sport had earned him respect and admiration within the cycling community. Boyes’ untimely death sent shockwaves through the community, leaving a void that will be difficult to fill. Friends, fellow cyclists, and supporters have come together to honor his memory and advocate for safer cycling conditions.

Calls for Safer Streets

The tragic incident involving Boyes has reignited the conversation about the need for improved cycling infrastructure and safer streets in San Francisco. The cycling community, along with concerned citizens, have been vocal in demanding protected bike lanes and other measures to enhance cyclist safety. In response to these calls, the Presidio Trust has agreed to implement certain infrastructure changes, including narrowed car lanes, increased warning signs, and guardrails for the bike lanes. These changes aim to prevent future accidents and make cycling in the city safer for all.

The Legal Proceedings

Arnold Kinman Low, the 81-year-old driver involved in the fatal collision, has been indicted by a federal grand jury. He faces two felony counts, including manslaughter and DWI. Low is scheduled to appear in federal court in San Francisco before U.S. Magistrate Judge Alex Tse for his initial hearing. The legal proceedings will shed further light on the circumstances surrounding the crash and determine the consequences for Low’s actions.


The tragic death of Ethan Boyes in a collision involving an allegedly intoxicated driver has brought the issue of cyclist safety to the forefront in San Francisco. The incident has sparked a renewed commitment to improving cycling infrastructure and making the city’s streets safer for all road users. As the legal proceedings against Arnold Kinman Low unfold, the case serves as a stark reminder of the importance of responsible and sober driving. The memory of Ethan Boyes will continue to inspire efforts to create a safer environment for cyclists in San Francisco and beyond.






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