The Leech Voiron worked in the infirmary and sanitarium attached to the local prison. Given his medical and moral predilictions, Voiron is a good source for poisons, sleeping draughts, and various narcotics. It is rumored that the churigeon is in fact a ranking member in a little known Chaos cult dedicated to the so-called "Old Ones" — and might have contacts interested in the procurement of items bearing the blessings of their ancient power.
After his help in the Company's clash with a cult of Ythogtha, the "Lord of Dark Waters," Voiron fled the city amidst rumors placing him as the ringleader in a plot to sell Glantrian prisoners as slaves to the Darokinese, and a reward placed upon him by the Seneschal of the city. Rumors later placed him at the accursed Temple of Elemental Chaos, in the mountains north of Caurenze.
See also
pre-session 18
session 18 carousing
Temple of the Frog part II