In criminal law, an overt act is the one that can be clearly proved by evidence and from which criminal intent can be inferred, as opposed to a mere intention in the mind to commit a crime.[1] Such an act, even if innocent per se, can potentially be used as evidence against someone during a trial to show participation in a crime.[2] For instance, the purchase of a ski mask, which can conceal identity, is generally a legal act but may be an overt act if it is purchased in the planning of a bank robbery.