Edward Masterson was the eldest of seven children of Thomas & Catherine Masterson. He was born in Henryville, Canada but grew up in New York. He was the older brother of famed western lawman, Bat Masterson. A few years after the Civil War, the family bought an 80-acre farm near Wichita, Kansas. A few years later, Ed and brother Bat left home. They were active around Dodge City first as grading contractors, then they tried their hands at buffalo hunting and became prosperous. In June 1877, Ed was appointed deputy marshal of Dodge City and very quickly became popular and respected throughout the entire town. Seven months after his appointment to the police force, he was promoted to city marshal. In the evening hours of April 9, 1878, Ed, along with his deputy, Nat Haywood, tried to control a group of cowboys wooping it up at the saloon. Ed disarmed Jack Wagner and gave the gun to Wagner's boss, A.M. Walker. When Masterson left, Walker returned the pistol to Wagner. Wagner went outside and got into a wrestling match with Ed. Wagner's pistol discharged in the struggle and the bullet hit Masterson in the abdoman and exited through his lower back. Even though shot, and his jacket on fire from the powder blast, Ed pulled his gun and fired 4 shots, killing Wagner and wounding Walker. Masterson then turned and stumbled 200 yards to the saloon and fell to the floor. He was carried to brother Bat's room where he died a short time later. He was 25 years old. Ed's funeral was attended by the entire town who mourned the loss of the lawman that they had come to love and respect.
________________________________________

THANKS TO Trey P for the following information"

The bio indicates that Edward killed Jack Wagner. It is not known whether Edward or his brother Bat returned fire killing Jack Wagner, as this is a matter of historical dispute. Most sources claim it was his brother Sheriff Bat Masterson.
________________________________________