1. Except as provided in section 562.026, a person is not guilty of an offense unless he or she acts with a culpable mental state, that is, unless he or she acts purposely or knowingly or recklessly or with criminal negligence, as the statute defining the offense may require with respect to the conduct, the result thereof or the attendant circumstances which constitute the material elements of the crime.
2. A person "acts purposely", or with purpose, with respect to his or her conduct or to a result thereof when it is his or her conscious object to engage in that conduct or to cause that result.
3. A person "acts knowingly", or with knowledge:
(1) With respect to his or her conduct or to attendant circumstances when he or she is aware of the nature of his or her conduct or that those circumstances exist; or
(2) With respect to a result of his or her conduct when he or she is aware that his or her conduct is practically certain to cause that result.
4. A person "acts recklessly" or is reckless when he or she consciously disregards a substantial and unjustifiable risk that circumstances exist or that a result will follow, and such disregard constitutes a gross deviation from the standard of care which a reasonable person would exercise in the situation.
5. A person "acts with criminal negligence" or is criminally negligent when he or she fails to be aware of a substantial and unjustifiable risk that circumstances exist or a result will follow, and such failure constitutes a gross deviation from the standard of care which a reasonable person would exercise in the situation.