If my husband was arrested for domestic violence and they ate trying to charge him for child endangerment, what will happen?

Prosecutors will never drop charges just because the victim has had a change of heart/story. The fact is, in 95% of all DV cases the parties reconcile, and prosecutors are well aware of this. He needs a good lawyer, because if convicted he will get a criminal record, lose his gun rights for life, and be forced to attend a long and expensive 52-week class.