When Elyra mentions the human-sized tracks she found at Father Tobyn's gravesite, Sheriff Hemlock frowns and opens his mouth to ask a question but is quickly but off by Mayor Deverin, who says, "Light boots or shoes could have been anyone in town. We'll have to watch for more evidence, which I'm sure will turn up over time if we do have someone in Sandpoint bent on devilry." Sheriff Hemlock turns his head and scowls out of sight of the mayor, then looks back to Elyra, his eyes full of question. When Elyra mentions coins, the sheriff looks doubtful. "I'm afraid in the confusion of yesterday I don't remember any coins, Elyra. Refresh my memory?" If shown the coins or if a verbal description is given, the mayor and sheriff will confirm that the coins are not locally minted. "Doesn't even look/sound like it came from Magnimar, not by my reckoning," says Sheriff Hemlock of the coins.
Detect evil does not grant a saving throw, nor does it offer spell resistance. Additionally, there is nothing in the spell description that would indicate anyone standing within the cone-shaped emanation would automatically sense the spell. The only case I can think of for a "target" to know Sivan is using detect evil would be if someone possessed and used Spellcraft to determine what Sivan is doing based on the verbal, somantic, and/or divine focus elements of the spell.
In reply to Sivan's question whether Father Tobyn had any enemies, Sheriff Hemlock is the first to speak. "None. Father Tobyn was loved by all--he never feared to lay hands on the sick, nor to collect alms for our wayward souls. Perhaps his only fault was being overly zealous at times--a turn off to visitors from time to time--but those who knew him best loved him well."
Sheriff Hemlock appears startled by Talashia's declaration to work for free for the good of the town, and switches his attention from Sivan and Elyra to Talashia. Though quiet, the Sheriff has a hard look at the lass, his eyes upon her for long moments. When Sivan states that he will use a portion for expenses but intends to give the remainder to the Cathedral for a shrine of Shelyn, the sheriff grunts and nods. "That's in keeping with the spirit of the Cathedral, Brother. No doubt Father Zantus will be delighted."
Mayor Deverin is quicker to respond to Talashia than is the hard-staring sheriff. "Sleep on it, Talashia. I'll give the gold to your comrades to hold for you, in case you meet with ill favor along the way and find yourself in need of funds. That reminds me..." Mayor Deverin gets up and walks behind Sheriff Hemlock's desk and hauls out a small but heavy lock box. Unlocking the safe with a key from a cord at her belt, the mayor reaches inside and pulls out four sacks, which she hands round. Inside are battered but serviceable gold coins, 200 of them by the look of it. The mayor holds the fourth sack out, "This would be Talashia's. Who will hold it in her stead?"
One leather coin pouch containing 200 gp given to Sivan, Elyra, and Tac. A fourth pouch (intended for Talashia) also offered. Let me know where the fourth pouch goes.