"Maybe the vampires deliberately targeted him, then. Maybe he even knew some of them before they were turned."
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"Let's see what this key reveals. It could lead to more information."
Retracing your steps from earlier that day, the group makes their way back to the Grand Vault, the scene still very much in chaos as citizens continue to beseech the Abadaran priests for healing. Knowing the existence of a rear entrance, the group quickly avoids the mob scene they encountered earlier and makes their way inside the cathedral. Eventually you are stopped by a member of the clergy, "May I be of some assistance? You seem lost."
"Is he returned yet?" Staryth says, and looks about for the vaults where the key might go as well
"We're also here to receive the contents of one of your vaults," notes Staryth. He holds the key in view. "In private, of course."
"What they said."
The priest appraises the group for a moment before speaking, "I'm sorry, but Ishani is away on business, something dealing with the city guard I believe. I can take a message for him if you would like?" Turning to Silvio as the rake presents the vault key for inspection, the priest says, "Of course, you can see the keeper near the cathedral entrance for deposit access. I can lead you there if you wish."
"Directions would suffice, you've already been so kind," Staryth assures.
"Yep, we'll take it from here. Thanks!" Silvio makes his way toward the keeper.
"Yea thanks."