Expert witnesses can make a huge difference in the outcome of a criminal trial. The law only allows experts to testify if their opinions are outside the general knowledge of an ordinary juror. In other words, they are probably opining about something scientific and/or technical outside the jury’s general familiarity and education. That unfamiliarity often leads jurors to afford expert opinions considerable weight. If you’re facing a criminal trial where the state plans to use an expert (or experts) as part of its case, you need a skilled Maryland criminal defense lawyer on your side. A knowledgeable advocate can help ensure that a proposed expert is qualified and that the testimony they give is allowed under the court’s limiting instructions.
There are many ways to blunt the prosecution’s use of expert testimony against you. A recent Montgomery County homicide trial illustrates the law that governs these legal arguments and court determinations.
The accused, G.J., was on trial in connection with a double murder in Burtonsville. According to prosecutors, the accused met with J.F. to pay a drug debt but, instead of paying, shot and killed J.F. and A.D., who had driven J.F. to the meeting. The police’s investigation determined that the killer shot the pair with a 9mm gun.