In 1871, the first MPD officer was killed in the line of duty. On Friday, December 29, 1871, Officer Francis M. Doyle and several other officers attempted to gain entry to the house of a thief to recover stolen property. When they forced the door, the wife of the suspected thief fired at them, striking Doyle in the chest and killing him instantly. Although the wife was arrested and tried for the murder, she was acquitted. Officer Doyle was a veteran of the Civil War, having served in the US Navy, and had been with the MPD for five years. He was 38 years old at the time of his death and was survived by his wife and three children. He was buried in Congressional Cemetery.