Peggy Crier testified Thursday about the workings of the board, which repeatedly disciplined Dr. Randeep Mann for his prescription-writing practices.
Mann faces several weapons counts, and he is being tried with his wife, Sangeeta, who is accused of lying to investigators and obstructing the investigation.
The Medical Board chairman, Dr. Trent Pierce, was badly injured and remains blind in his left eye from the February 2009 blast outside his West Memphis home.
With the jury on a long break, lawyers spent much of the day conferring with the judge about admissibility of evidence that will be introduced as the trial continues.
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