Thanks to the comment by the supplier about Fel whispering to him, I'm wondering if each murder was committed by a different person compelled by Fel this way.
I think so, too. I would focus on getting more information about Fel.
This is a very wild guess, but could the retching man maybe - involuntarily - have killed the elf, magically compelled by Fel?
I am glad we have the whole weekend to decide where to investigate next.
I actually have a theory every murder is following an MO involving the occupation of the victim. The Drafonborn was flayed so he might be a tanner, the victim at Insight Park was trapped in a hedge and stabbed, he might have been a gardener, the butcher was strung up like a slaughtered animal. With this in mind, the anchor wasn’t meant for the bard but for the sailor. That’s all pretty far fetched.
The sailor could have been the murderers marionette it’s hard to say, but we do know there were bloody bootprints heading off in the direction of the blushing mermaid. There’s also the absence of blood on him. I can’t say either way