If we see closely the definition of criminal defense, then we will come to know that thee are some present in every criminal case some conditions, those speak in the favor of the criminal person, and these points are always stand against the situation fabricated against the accused person.  These conditions negate the elements of crime. These are all called the defense. These all points join their hands in making the criminal innocent. In the different cases the whole of the burden rests upon the government normally, in the many cases before the tribunals. It also becomes the responsibility of the government to prove that all these defenses absent. As through this way only any accused person can be decided as the culprit. And in the other words we may say that these are the points or conditions, if these are present in any case proves the happening of the crime.

Various conditions of Criminal Defense
There are various conditions are present in the following lines those are very fit in making the conditions of criminal defense. Among these conditions, Insanity is one important condition; it is also called the mental disorder. This is the main point that shows the crime intention. Actually, in the fits of the insanity it really becomes very difficult, even impossible to judge about the actions.  I t really becomes very impossible that the actor or the crime may judge the intensity of its action. This is a main criminal defense, through the proof of this condition, any actor can be saved, and this can be treated as a criminal defense. When there is a performer is announced as a mentally disorder person, and all the doings made by him is treated as an innocent doing or he is declared as a not guilty by thee reason of insanity, then he is sent to mental hospital.
Automatism
There is a second condition that can stand as a criminal defense is the automatism, again it is a mental condition in which an actor fails to judge the actions being done by him. Automatism is such a state in which the muscles of any body perform, not under the control of the mind, these work at its own disposable. The performer feels the lack of consciousness. Normally, if we see more it medically then we will come to know that it mainly happened due to the condition of the traumatic stress in the body. And when this traumatic stress happens, then a person falls ill, into the dream like situation due to this automatism. In this condition the performer losses all the controls of its body, and it is called the destruction of voluntary control. It has also been noted medically that this happens due to the continuous working, like the continuously driving from too long route. In this condition if anything happens wrong that comes in the criminal defense and it may be used in the specific crime intention.
Alcohol
There is another most of the important criminal defense that can be presented is the intoxication.  In the state of the intoxication can negate the specific intention of the crime. The cases discussed by the experts in the fits of intoxication, they say that the performers of these cases are the under the control of intoxication that is the reason they loose a proper control over their nerve system.  So the intoxication that can be of alcohol or drug can be used as the criminal defense.
Drug
There is also one of the most of the important criminal defense can be drug, under the effect of the drugs any person lose its all consciousness and he may do any thing. So we may also count the drug as a source of criminal defense.