Retro Review: Necessary Evil
When Quark is attacked, Odo must reopen a murder case, begun when the station was under Cardassian control, for which Kira was a prime suspect. Plot Summary: Longtime acquaintance Pallra summons Quark to Bajor to ask him to retrieve a box her dead husband Vaatrick hid on Deep Space Nine while it was still Terok [...]
Source: Retro Review: Necessary Evil
http://www.trektoday.com/content/2012/04/retro-review-necessary-evil/