( CNN ) Weeks after a grand jury chose not to indict the officer who shot Michael Brown , officials have released a new mound of documents from the weeks of proceedings . They include more witness interviews , an autopsy conducted by a Justice Department medical examiner , as well as radio communications from the day of the shooting , which CNN has reported on previously . The documents do not seem to shed any new light on the events that led to Officer Darren Wilson shooting Brown . On November 24 , the day the grand jury 's decision was announced , the St. Louis County prosecutor 's office released thousands of documents from the proceedings . Among the details that emerged : Wilson fired his gun 12 times ; the officer said he feared Brown could beat him to death ; and Wilson said he was not carrying a stun gun because `` it is not the most comfortable thing . They are very large . '' The latest document release does not include one notable element : the FBI interview with witness Dorian Johnson , Brown 's friend who was with him at the time of his shooting . Despite the promises of St. Louis County Prosecutor Bob McCulloch , who had promised to make all witness testimony in the case public , McCulloch 's office told CNN affiliate KSDK that it has kept some records secret at the request of federal authorities , who are still investigating the incident . Executive assistant Ed Magee said the office had `` turned over and relinquished control '' of the FBI 's interview , according to USA Today . He said the FBI asked the county not to release records that are part of an ongoing federal civil rights probe . What Darren Wilson told the Ferguson grand jury . The Justice Department autopsy found that Brown 's multiple gunshot wounds included one in the right hand at close range . Those findings are similar to previous autopsy results . CNN 's Rachel Clarke and Mariano Castillo contributed to this report .
The St. Louis County prosecutor 's office releases hundreds more documents . They include witness interviews and an autopsy from a Justice Department medical examiner . They do n't include FBI interview with Michael Brown 's friend and witness Dorian Johnson . Prosecutor had vowed to share all witness testimony ; now says some records must be secret .