Defense of infancy

The defense of infancy is a form of defense known as an excuse so that defendants falling within the definition of an "infant" are excluded from criminal liability for their actions, if at the relevant time, they had not reached an age of criminal responsibility. After reaching the initial age, there may be levels of responsibility dictated by age and the type of offense committed.

Under the English common law the defense of infancy was expressed as a set of presumptions. A child under the age of seven was presumed incapable of committing a crime. The presumption was conclusive, prohibiting the prosecution from offering evidence that the child had the capacity to appreciate the nature and wrongfulness of what he had done. Children aged seven to under fourteen were presumed incapable of committing a crime but the presumption was rebuttable. The prosecution could overcome the presumption by proving that the child understood what he was doing and that it was wrong. Children fourteen and older were presumed capable of committing a crime. However, the child could rebut this presumption by establishing that because of his immaturity he was incapable of understanding what he had done or the wrongfulness of his conduct.