The staff testimony is interesting. I have fantastic staff, but if they thought I was involved in a murder, they would do the right thing, without a doubt. Dental assistants in the USA are usually poorly paid- under $20/hr. If KM was supposed to have worked there for two years, even part time, there would be time sheets, payments of income tax on her behalf made by the practice, and of course the other staff would remember her. It did not sound like she had much training or experience-from her previous work history, who inducted her, or trained her? (Every practice is slightly different to very different-even if the lady with 40 years experience turned up to work at my practice on Monday morning, she would still need to be shown how to use the autoclaves, where everything is etc)