Rogue Knight

 is a faction side quest from the Dozens in.

Synopsis
Osric, a freshly-made trainer of the Dozens and former member of the Crucible Knights, asks the Watcher to recover his family's heirloom, a breastplate that has been in it since the War of Defiance. The breastplate is held by novitiate Penhelm, a snitch who got Osric expelled from the Knights.

Walkthrough

 * 1) Talk to Osric in the Admeth's Den Expedition Hall in Copperlane to receive the quest.
 * 2) (Optional) Talk to Penhelm in the Crucible Keep.
 * 3) Take Penhelm's Affidavit from the Crucible Keep's archives, which is right past the main hall.
 * 4) Bring the affidavit to Kurren in Hadret House in Brackenbury.
 * 5) Once you leave, Penhelm with some Knights of the Crucible's Novitiates will confront you and demand the affidavit back.
 * 6)  Choosing to give back the affidavit right away, or be honest and then give back the affidavit, will give you Moderate Positive reputation with the Knights of the Crucible. Being clever or cruel however will lead to a fight. (You may ask him for the importance of this before making your choice.)
 * 7) (Optional) Ask Penhelm to return the favor and give back Osric's Family Breastplate. He asks why he should. Talking about the armor's importance to Osric will give you nothing, while your diplomatic or passionate response will at least earn you 200 . Only by asking him if he's that stuck in the past will he hand the armor to you – which is the only way to make both sides involved in this quest happy.
 * 8) If you provoked him or refused to give him the affidavit, Penhelm and his friends will attack you. You can then loot the armor from his corpse.
 * 9) Return to Osric to complete the quest.