(a) A person commits the crime of tampering with physical evidence if, believing that an official proceeding is pending or may be instituted, and acting without legal right or authority, he:
(1) Destroys, mutilates, conceals, removes or alters physical evidence with intent to impair its use, verity or availability in the pending or prospective official proceeding; or
(2) Knowingly makes, presents or offers any false physical evidence with intent that it be introduced in the pending or prospective official proceeding.
(b) "Physical evidence," as used in this section, includes any article, object, document, record or other thing of physical substance.
(c) Tampering with physical evidence is a Class A misdemeanor.