Negatory, good buddy. The definition of a "crime" is an offense against the dignity of the sovereign, which she will punish in her own name. Once a summons, warrant, or indictment has been issued, regardless of who the complainant might have been, the action is Commonwealth of Virginia (or some political subdivision thereof) v. the defendant. The complaining witness is just that; merely a witness. It's the Commonwealth's case, and the Commonwealth's Attorney (or county, city, or town attorney in some cases) is completely in charge. The complainant has absolutely no say in the matter at that point.
Also, the procedure is this: if the charge is a felony, only the Commonwealth's Attorney can approve a warrant to be issued by the magistrate, although the C/w can use a grand jury to indict someone on either a felony or misdemeanor (or both). In cases of misdemeanors, the complainant is either a cop or ordinary citizen. Citizen complaints must be in writing and sworn. Cops' complaints can be oral, but must also be sworn.
One thing that really bothers me is that cops routinely use the oral complaint thing to prevent the real complainant from having to write a statement which must then be served along with a copy of the warrant. So they talk to some bozo, don't really do any "investigation" at all, then go to the magistrate (as apparently happened in this case), and swear out the complaint orally themselves. Here's the thing that bothers me: when the cop is under oath, he has to be stating facts within the scope of his personal knowledge. If the "fact" is, "I did an investigation", then that really has to be a fact, and if all he did was get a whacked out version from some buddy of his, then that's not an "investigation". Even then, the magistrate ought to be asking someone with personal knowledge of the facts to make a statement under oath, otherwise, the warrant is baseless.
I feel strongly that the statute ought to be amended. All statements should be in writing and ought to be based on the complaint of a witness with personal knowledge of the facts. If a cop is going to be the complainant, then he should be required to actually know what happened before he makes a statement under oath. It would be a great benefit to the Commonwealth generally if some political pressure were brought to bear on that issue.