ONLY the District Attorney (actually the Assistant District Attorney, or ADA) who can drop charges. Once the defendant is charged, it is the Commonwealth v. Defendant, not Victim v. Defendant.
The ADA represents not only the victim, who has a personal interest in the outcome, but the Commonwealth of Massachusetts as a whole, that has a community interest in keeping criminals off the street or making sure they are punished.
This is the underlying theory and reason why a victim cannot dictate the dropping of charges such as Assault & Battery. However, that does not mean that if handled properly, a victim cannot greatly influence both the prosecution or the dismissal of the charges.
The ADA will typically NOT dismiss just because the victim changes his or her mind, or even if the victim never wanted charges brought to begin with. Once the police are called, it is essentially out of the hands of the victim.
If the police hear the elements of a charge, they have a mandate to bring that charge. Once the ADA gets the charge, it is their job to prosecute those charges. A good defense lawyer should be able to navigate through the Constitutional rights that all parties have to get the charges dropped, but it is not simple and not likely to happen without an attorney.
Answered on Aug 20th, 2012 at 2:25 PM