The internal report was released following a complaint to the public transparency watchdog the Information Commissioner’s Office (ICO).
The council had initially declined to disclose the document through a Freedom of Information (FoI) request.
The PPS last month said issues in building a “clear evidential picture” included “no CCTV coverage”.
It also said the Sinn Féin employee’s resignation “contained no admission”, and a man interviewed by police “exercised his right not to answer questions”.
Little-Pengelly called on Sinn Féin members to “tell the truth about what happened”.
Speaking in the Northern Ireland Assembly on Monday, the DUP minister said the “disgraceful” vandalism appeared to be a “sectarian attack”.
It comes after the first minister last week faced more questions from assembly members over what her party knew about the incident.
The DUP accused the Sinn Féin vice president of “misleading” the assembly in her statement in the chamber following the incident.
But O’Neill said she was “very confident” in the actions she and her party had taken.
She said the damage was “fully investigated” by the Police Service of Northern Ireland and the PPS “has made its decision, and that is the appropriate course of action”.