Attorneys for the family of David Koschman on Tuesday asked a judge to release transcripts of interviews that investigators recently conducted with Koschman’s friends and other witnesses. Cook County State’s Attorney Anita Alvarez included portions of those interviews in her objection to Nanci Koschman’s request that a special prosecutor re-examine what happened to her son, who died in 2004 following a drunken confrontation with a group that included Richard J. “R.J.” Vanecko, a nephew of then-Mayor Richard M. Daley.