The Woman at the Airport - S1-E10
Plot hole: The surgical instrument that killed 'Susan' was the same one used on her jaw during her plastic surgery. 'Leslie" would not have been able to get the instrument to use to murder her and then put it back in the case, since it was still in the office in the case when Bones and Booth came to get it.
Answer: Answering my own question here but, having contacted various people involved in the production of Bones including Kathy Reichs, Hart Hanson, Eric Milligan, and Deirdre Lovegood who portrayed Taffet onscreen I finally have the answer. No-one know how she did it due to her constantly working alone. And she never revealed this information before her death.
Ssiscool ★