With reference to the BlogAdda WhoDunnit Mystery contest at (http://blog.blogadda.com/2010/05/12/a-mystery-fiction-contest-whodunnit). Going a bit creative and not with the obvious solution.
The Killer: Actually Lila never died. R and Lila conspired together and killed Sia. Hence the mangled armband and the missing bullet pendant. She could have been killed by the poisoned tea that the second husband fed Lila once and which was probably the one that Lila offered him during the last meet and which could also explain the broken ceramic.
The Object (http://www.pringoo.com/custom-designs/Snake7-cool~and~awesome~saying~and~design/did-14704/mid-3/ppid-79)