A Parliamentary committee on gun and gang violence this morning heard about the benefits of using technology to trace where illegal guns are coming from.The advice came from Pete Gagliardi, senior vice president of Forensic Technology, a Florida firm that specialises in such analysis.Meanwhile the committee also heard from Major Shawn Critch, Divisonal Commander for the Salvation Army.He advocated a “restorative” approach to justice, and educational programmes for primary school children.