Peter works as a professional Computer Hacking Forensic Investigator for eLaw-Suit law firm. He is working on a case of a cyber crime. Peter knows that the good investigative report should not only…

Giving a firsthand account of something seen or heard describes the manner of testifying characteristic of a lay witness, but it is the absence of expert qualification - not the firsthand nature of the account - that defines a lay witness.

Having special knowledge of the subject being testified about is the defining characteristic of an expert witness, which is the opposite of a lay witness.

Observing an event describes an eyewitness and overlaps with lay witness behavior, but observation alone is not the formal legal criterion that distinguishes lay witnesses from expert witnesses.

The controlling legal distinction is that a lay witness lacks the specialized knowledge, training, or credentials required for a court to qualify them as an expert witness. Unlike expert witnesses, lay witnesses are restricted to testifying about facts they personally perceived and cannot offer opinion testimony based on specialized expertise. Forensic investigation reports exclude lay witness testimony precisely because it does not carry the evidentiary weight of qualified expert opinion.