(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 happened to Michael Brown?
By who?
What is his job?
Was it an accident?
When did this happen?
How many times did he pull the trigger?
Was he shooting back?
What was he scared of
Why didn't he use a stun gun?
Why not?
What size are they?
Was Wilson indicted?
Who made that decision?
Was an autopsy performed?
by who?
How many documents did the prosecutor's office give to the public?
Whose interview was among them?
Who is he?
Where was he when Brown was killed?
Who interviewed him?
he was shot
who shot Michael Brown
Darren Wilson
Darren Wilson shooting Brown
police officer
 the officer who shot Michael Brown
no
he feared Brown could beat him to death;
unknown
unknown
12
 Wilson fired his gun 12 times;
no
 he feared Brown could beat him to death
Brown could beat him to death
the officer said he feared Brown could beat him to death
he wasn't carrying one
Wilson said he was not carrying a stun gun
it's not comfortable
 he was not carrying a stun gun because "it is not the most comfortable thing.
large
They are very large." 

no
after a grand jury chose not to indict the officer
a grand jury
a grand jury chose not to indict the officer 
yes
an autopsy conducted by a Justice Department medical examiner
a Justice Department medical examiner
 an autopsy conducted by a Justice Department medical examiner
thousands
the St. Louis County prosecutor's office released thousands of documents
Dorian Johnson
the FBI interview with witness Dorian Johnson
Brown's friend
Dorian Johnson, Brown's friend 
with him
 Dorian Johnson, Brown's friend who was with him at the time of his shooting
the FBI
 the FBI interview with witness Dorian Johnson