Evidence is anything that tends to prove or disprove a material or relevant fact alleged in a lawsuit or other legal proceeding. Witness testimony, documents, contracts, email messages, photographs, medical bills, video images, and voice recordings are common pieces of evidence.
In Maryland, evidence is governed by the Maryland Rules of Evidence, which are consistent with the Federal Rules of Evidence. These rules determine what is considered admissible evidence in court. Evidence must be relevant to be admissible, meaning it must make a fact more or less probable than it would be without the evidence and be of consequence in determining the action. Common forms of evidence include witness testimony, documents, contracts, email messages, photographs, medical bills, video images, and voice recordings. Each piece of evidence must be authenticated or identified as what the proponent claims it to be. Additionally, evidence must not be overly prejudicial, confuse the issues, mislead the jury, or result in undue delay or waste of time. Hearsay, or statements made out of court offered to prove the truth of the matter asserted, is generally not admissible unless an exception applies. Maryland courts also have specific rules regarding the admissibility of expert testimony and scientific evidence.