What can be done?
First, he must answer the summons. If not, a warrant will be issued for his arrest.
Second, when he does appear, he should not try to tell his story to the judge; the first appearance is not the time for a trial.
Third, Target doesn’t present the evidence. The prosecutor does and, if the case goes to trial, they have to convince the judge/jury of your husband’s guilt beyond a reasonable doubt.
Finally, if he does have video evidence, then he has a strong case to fight. A lawyer would be able to evaluate the evidence and make the most of it. You should find a lawyer quickly, as the officers sometimes “forget” to request security footage from the stores until it’s too late. Then it will be up to the words of the witnesses.