This case comes to this court on a writ of error to review a judgment of the criminal court of Cook County, based on a jury verdict finding defendant, Floritta Ruffin, a colored person, guilty of the murder of John Baker, and which fixed her punishment at one hundred and ninety-nine years in the penitentiary. She alleges there is reasonable doubt as to her guilt, because the evidence for the People is unsatisfactory and difficult to reconcile. She admits killing Baker by shooting him, but claims she did so in self-defense. Three of the persons who witnessed the shooting testified for the People; aside from the defendant, no one testified in her behalf in respect to the actual killing which occurred about midnight on October 15, 1946. Defendant entered a tavern on the south side of East Forty-seventh Street in Chicago, and seated herself at the bar, which ran north and south for about fifty feet parallel to the east wall, to which it was connected at the north end by a curved part. Her position at the bar was just south of the curve. After she had been there for some time, John Baker, also colored, and a white man entered the tavern, both of them strangers to the defendant, and took positions not far from her. On duty at the time were bartenders Earl Fernell in the north service area of the bar and Louis Williams in the south area. Sam Wilson, a visiting bartender friend of Williams, was at the south end of the bar. These three men were the eyewitnesses of the killing, who testified for the People. All present were colored, except the lone white man who had entered the tavern with Baker.