What type of attorney would i speak to about no testifying at a court date i was subpoenaed to testify in?

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If you are served a subpoenaed requiring you to testify at preliminary hearing in a feloney criminal court case not against you and you do not show or refuse to testify. What will happen? What type of lawyer should i contact?

What type of attorney would i speak to about no testifying at a court date i was subpoenaed to testify in?