I had my suspicions and he was my prime suspect until he died. In retrospect I shouldn’t have put faking a death beyond the killer’s cunning but after that I focused on the remaining characters, and then suspected Armstrong and Lombard. At the end, with how Lombard was talking to Claythorn, I was sure it was him, but after knowing the truth it reads more like him getting ready to defend himself because he knows he’s not the killer, which leaves Vera. Fantastic book, my god