in criminal law, a mental state in which a person cannot be held criminally liable.
In the USSR, both legal and medical criteria are used to define the state of nonimputability under criminal law. For a person’s criminal nonimputability to be recognized, it must be established that the person was not aware of the consequences of his or her actions or was unable to control such actions, and that chronic mental illness, temporary disruption of mental activity, feeblemindedness, or some other pathological condition was present. Where at least one of these pathological conditions prevails in combination with the facts of the case, as established by forensic psychiatric testimony, the court recognizes the accused to be not criminally liable. Mandatory medical measures, which do not constitute criminal punishment, may be applied to the accused by court order; such measures include placement in a general or special psychiatric hospital. Similar measures are applied in cases where the accused is criminally imputable at the time of commission of the crime but becomes mentally ill prior to sentencing.