Chalk Law and Legal Definition
Demonstrative evidence produced before a fact finder are admitted as chalks. It can be drawings, sketches or models referred to by a witness. Chalks are used to illustrate testimony but they are not evidence in the ordinary sense of the word. [Commonwealth v. Shea, 38 Mass. App. Ct. 7, 12 (Mass. App. Ct. 1995)]. The trial judge has considerable discretion as to the degree to which chalks can be used. [Alholm v. Wareham, 371 Mass. 621, 631 (Mass. 1976)] Charts summarizing voluminous records or other documents may be used as chalks.