Kim Stephens and Deborah Elvins present "Finding, Preparing, and Using Expert Witnesses: Ethical Issues in Presenting Expert Testimony" for the Washington State Bar Association.  An outline of the presentation is summarized below.

   I.    Introduction
   II.   Duty to Preserve Client Confidences (RPC 1.6)
   III.  Conflicts of Interest and the "Tainted" Expert
   IV.  Ex Parte Expert Contracts (RPC 3.4(c) and CR 26(b)(5)
   V.   Expert Witness Fees (RPC 3.4(b))
   VI.  Duty to Prevent False Testimony (RPC 3.4(b))
   VII. Duty of Candor toward the Tribunal (RPC 3.3(a))

Find the attachment here.