The Massachusetts Appeals Court upheld a former Roxbury man’s conviction on voluntary manslaughter charges in the 2007 shooting death of a 22-year-old woman who was caught in a crossfire between gang rivals on a Dorchester street, authorities said Tuesday.

Casimiro Barros, 26, argued that evidence introduced at ­trial of his gang affiliation and the group’s ongoing feud with the gang of his intended target was prejudicial, but the appeals court found that the information was critical to the jury’s under­standing of the case, prosecutors said.