He can be charged with possession of meth if the residue tests positive for it. What sentence he may be facing depends on the strength of the evidence, his criminal history, the judge, the prosecutor, the lawyer representing him and other factors. Your husband needs a lawyer.
If there is enough residue in the bag to be tested, and they don't need much, then they will charge him with felony possession. If it is a first lifetime arrest, then chances are good an attorney could work out a plea that is only probation rather than jail time.
Jail? Perhaps. It depends on the judge, the prosecutor, the defense lawyer, the facts, the law, his criminal history, and any other relevant attendant circumstances. You can expect that your husband needs to hire the best lawyer he can afford, and follow that lawyer's advice, sooner rather than later.
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