Warren G. Yenser was born in Lyons, Pennsylvania on October 1, 1907, moving to New Jersey in 1921. He graduated from Neptune, New Jersey High School in 1925 and was a member of its first team in baseball winning his letter. Although his parents returned to Pennsylvania, he remained in New Jersey, moving to Elizabeth after graduation from High School. He resided in Ewing Township, Mercer County, New Jersey.

Before entering the New Jersey State Police, Trooper Yenser was employed by Clarence Hudson & Co. Brokers on Wall Street in New York City. He was presented with a medal in July 1929 as the winner of the A.A.A. campaign of Master Bank Stock Salesmen.

Trooper Yenser enlisted with the New Jersey State Police on April 16, 1931 as a member of the 24th State Police Class, and was assigned to Troop "C", Penns Neck. His service with the Department was characterized by loyalty, fearless performance of duty, and faithful and energetic devotion to the principles of the New Jersey State Police.

Trooper Yenser's death was the result of gunshot wounds suffered while in the performance of duty.

On November 9, 1935, at approximately 4:45 A.M., Trooper Yenser was accompanied on patrol by Trooper J.J. Matey. They were in pursuit of a stolen Chevrolet Coup that was proceeding north on State Highway 26 near Sand Hill, New Jersey. The chase lead to State Highway 25 near Metuchen Avenue in Woodbridge Township, Middlesex County. While attempting to stop the car, Trooper Yenser was shot and instantly killed.

The shot causing the death of Trooper Yenser was fired from a shotgun. It was in the possession of one of the occupants of the stolen car, who broke the rear glass window of the coupe to fire through. Trooper Yenser received the full discharge of this shot in his face, head and throat.

Trooper Yenser served 4 years and 6 months with the New Jersey State Police and was survived by his wife. He was 28 years old.