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Based on what you are describing it sounds as though you are describing "ineffective assistance of counsel" which is a ground for appealing the case and getting his verdict overturned. It could also be grounds to sue the attorney for malpractice as well as filing a complaint with the Idaho bar against the attorney.
At this point there are several things for you to consider.
First, you must consider getting your son a criminal appeal attorney and get a review of his case to file an appeal based on ineffective assistance of counsel and any other issues the attorney finds in the case file upon reviewing the record.
Second, depending on what the criminal appeals attorney finds, then you would consider filing a complaint to the Idaho bar disciplinary counsel against the attorney for not properly representing your son.
Finally, you would be able to sue the attorney for malpractice if the disciplinary counsel and/or the criminal appeals attorney finds that the prior attorney did not perform properly as you described.
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