A standard policing strategy is the use of an agent provocateur to offer temptation to suspected criminals. In some countries, evidence resulting from entrapment is inadmissible. Nevertheless, undercover police officers do sell real or fake contraband such as illegal drugs or guns, as a means of exposing criminal activity. Some consider the use of fake material as a slightly safer way to catch criminals, rather than risk the real contraband falling into the wrong hands. But if there is no actual contraband and the actus reus of the full offense is "possession" of prohibited materials, there can be no criminal possession. Can there be an attempt to possess when, in the circumstances, it was impossible to follow through to commit the full offense
