Korvosa, City of Fangs
A talented but depraved necromancer whose obsession with constructing a corpse golem got him expelled from the Academy. Not because the magic itself was frowned upon, but because he had begun killing vagrants and beggars to use as components for his experiments.
His name was written in Gaedren’s ledger as being the one to suggest testing various poisons and diseases on a wide range of people, to test their effects and to see if the afflicted people realized what was affecting them.
Recently, Elaraiyne found a scrap of paper with his name written on it stuck to a zombie. She suspected it was a name, of someone personally involved in the recent upsurge of undead, and the party confirmed her suspicions when she told them about it.