The Suffolk County district attorney’s office on Friday withdrew charges against a Jamaica Plain man who had been charged in a shooting that partially paralyzed a 9-year-old girl last year.

Dominique Finch, 27, was arrested last month in the shooting at a Roxbury housing complex on Annunciation Road at 1 a.m. on Oct. 9. The victim was playing outside at a birthday party when she was shot.

Suffolk County District Attorney Daniel F. Conley said prosecutors decided to withdraw the charges against Finch, saying that ethical codes prevent bringing criminal charges “in the absence of sufficient admissible evidence to support a conviction.’’

“Based on further investigation and a careful review of the current state of the evidence, the Commonwealth may not be able to sustain its burden of proving every element of the crimes charged beyond a reasonable doubt,’’ prosecutors wrote in the request filed in Roxbury District Court.

At an arraignment in February, prosecutors said that information from a GPS bracelet that Finch was wearing for an unrelated case placed him at the scene on Annunciation Road. A police report filed in court said that Finch is associated with a Jamaica Plain gang that has a violent rivalry with a gang on Annunciation Road.

The prosecutor at the arraignment said the 9-year-old was an unintended target, and that Finch was aiming at three rivals who escaped unharmed. The gunshot wound to the girl’s back paralyzed her from the waist down and damaged her stomach, kidneys, and spinal cord, the prosecutor said.

Conley did not say Friday why the charges against Finch were withdrawn. However, the district attorney said his office reserves the right to bring new charges against Finch at a later date.

“As prosecutors, our job is to ensure that we have a solid foundation for every case we bring to court,’’ Conley said Friday. “There is nothing more important to me than the integrity of our work and our cases.’’

Conley said his office will continue to investigate the shooting with Boston police detectives, and urged anyone with knowledge of what happened to contact investigators.

The girl and her family told the Globe in February that she was recovering faster than expected. The mother said last month that she and her daughter have found comfort in friends and family: “She has a lot of people talking to her, telling her to keep her head up.’’

Jan Ransom can be reached at jan.ransom@globe.com. Follow her on Twitter @Jan_Ransom.