A victim changing their story or testimony doesn't guarantee that the charges against you will be dropped. In fact, it's very common for victims to recant or alter their statements. Still, criminal proceedings tend to continue on regardless of this. However, this scenario makes the case much easier to fight and win at trial.
Our firm has had a great amount of success handling domestic violence cases, particularly for this reason – because alleged victims often change their story or decide that they don’t want criminal charges to go forward. Of course, the prosecutor can still choose to pursue these charges, but losing the testimony of a key witness greatly improves the defense’s chances of finding success.
In most cases, this allows the defense to negotiate the case very well or prepare it to be dismissed at trial by preparing a compelling counter-narrative to the prosecution.