The following text has been transcribed verbatim from the game files. Upon completion of the Stronghold, it is available in-game on the 'Story' page, accessed from the 'INFO' tab of the pause menu.
Using his connections before his death, Sharp was able to pay off the jury for a trial concerning several Rollerz. Not wanting to let the Rollerz get off, Julius sent you to the apartment complex the jury was sequestered at so you could dismiss them.
Kill all the jurors that the Rollerz are protecting.
There are five different jurors to kill in two different apartment blocks; one apartment block has three jurors in while the other has two. While the jurors themselves don't provide any kind of challenge, there is heavy resistance from defending Westside Rollerz.
Killing any two of the five jurors, triggers five units of Notoriety, and SWAT units are dispatched, providing a greater challenge than the Westside Rollerz.