[Gather information check: 17 +4 = 21.]
Fendric smiles mischievously. Unfortunately for the poor halfling longshoreman, that was the right answer, just shady and mysterious enough to elicit suspicion from a halfbreed acolyte of the Sun God who's looking for any excuse to pump him for any bit of information. In fact, when Fendric's through with him, he might be fit for the clergy himself.
"Ah. Then, of course, you swear on pain of eventual reincarnation as a dung beetle that you are hiding no bodies, dead or alive; that you are not a polymorphed servant of the Foe of all Good, masquerading as fine upstanding citizens of the halfling community; nor are you polymorphing important prisoners as cute little hounds, Pelor Forgive You, and that not only will you let us look in the BIG bag to confirm your story, but you will also willingly submit to a Zone of Truth and tell us absolutely everything and everyone you encountered down the river, especially if they were cultists, or the aforementioned important prisoner!
Like I said, we're investigating all upriver and downriver traffic for some one we believe the Cult of the Enemy have taken prisoner. He is an important cleric of Heironeous, probably THE most important cleric of Heironeous in the land. So if you saw anyone bound and gagged in a boat, for example, you REALLY want to tell us, because, well, we're on a mission for the Crown, two Churches, and the Order of Radiant Knights, and those are people you REALLY want on your side, may the Light Protect and Keep them All.
I want people on my side, don't YOU want some people on your side*?
So tell us everything, and don't skip a bit!"
[*this line brought to you by the church of Ralphie May.]