Crossbows in the Bell Tower!!

Vornyn heads to the church of Darkenday in Brie and is greeted warmly by all of the congregation. He is given special quarters (good for life) for him and all of the companions. The special quarters contain 14 private small bedrooms which all surround a circular common area with a large table. There is also a private small grove and forest outside.
The high priest is aware of the affliction effecting Garaloph and suggests that he and the fellow priests spend the day with the companions to cast some ritual spells (wards) that will keep their souls free in case of their unfortunate demise. The spell is cast and the group agrees to remove their pinky toe in addition. This will cement their resurrections if anything were to happen to them along their journey. The toes are preserved in a bottle and mounted in a small alcove above each of the companions beds.
The following day their is a massive celebration in Brie for the companions who saved the town from the orcs. Statues of the group are commissioned and the party runs on into the night. At one point Delvin is pushed onto to a stage to dance in front of a roaring crowd. As the performance begins, a crossbow bolt is shot into his neck (just a half inch from his last crossbow scar). He drops to the ground and people scream and begin to run in a panic. The shot came from the top of the Bell Tower at the cathedral of Ion. The group heals Delvin and they all rush to the church.
They find dead Ionic priests all throughout the church. They also come upon a lot of mercenary bodies as well (24 in total). As they head to the back to the where the stairs to the tower would be, they are attacked by three crossbowman. Vornyn casts an entangle spell and the group attacks with ranged weapons until the mercenaries are dead. They save a wounded priest and he accompanies the group up the stairs. Unsure of how to proceed, they stack the dead bodies of the mercenaries in front of the doors to the stair well. The priest with them casts a flesh to stone spell sealing off the doors.
Behind another door, they encounter two more bowman who have overturned beds and bookcases to provide cover. The group summons a giant centipede to attack them from the rear so the group can rush in. They take one alive and break his knees and dislocate all of his fingers until he talked. They find that the their leader Henrich Mapleton is at the top of the tower and he was the one who shot Delvin. They also find out that Henrich's brother (also a thieves guild captain) resides in "Olde Town" to the south. They reach the top of the tower but do not find Henrich. They find a strange pentagram of burnt salt instead. Some type of dark magic at work....
The companions speak to the sheriff and he calls upon his brother who is a skilled magic user to investigate the pentagram. The group prepares to head to Olde Town next as the journey closer towards the mountains to save Garoloph from his affliction.