May 23, 1919
Patrolman Emil Carbonell
New York City Police Department, NY
Officer Carbonell was killed in a motorcycle accident while on duty. He was assigned to the Motorcycle Division. 
May 27, 1919
Patrolman Abner R. Braun
On May 27, 1919, Patrolman Abner R. Braun, while on duty and assigned to Motorcycle Patrol, pursued a stolen auto into Pennsylvania, where he was shot and killed by the suspects. Several hours passed before the fate of Patrolman Braun was learned, this due to the absence of radio communications.
August 27, 1919
Policeman C. B. Wyatt
Los Angeles Police Department, CA
Policeman Wyatt was killed in a motorcycle accident while on duty
September 24, 1919
Police Officer Edwin J. Wilson
Seattle Police Department, WA
Officer Wilson was killed when he lost control of his motorcycle and collided with a pole. 
Officer Wilson had been with the agency for six years and was survived by his parents and siblings. 
October 21, 1919
Officer Harvey J. Babb
Norfolk Police Department, VA
Officer Babb was killed in a motorcycle accident while on duty
November 9, 1919
Motor Deputy Harold B. Broadwell 
Los Angeles County Sheriff's Department California

Motor Deputy Harold Broadwell was killed while pursuing a vehicle. Motor Deputy Broadwell was pursuing a speeding vehicle when the suspect vehicle suddenly braked. Motor Deputy Broadwell took evasive action by turning his motorcycle into the opposite lane. He collided with a car traveling in the other direction. He was thrown approximately seventy feet. Motor Deputy Broadwell was transported to a local hospital where he died from his injuries a few hours later.