2C:28-6.  Tampering with or fabricating physical evidence
A person commits a crime of the fourth degree if, believing that an official  proceeding or investigation is pending or about to be instituted, he:

(1) Alters, destroys, conceals or removes any article, object, record, document or other thing of physical substance with purpose to impair its verity  or availability in such proceeding or investigation;  or

(2) Makes, devises, prepares, presents, offers or uses any article, object,  record, document or other thing of physical substance knowing it to be false  and with purpose to mislead a public servant who is engaged in such proceeding  or investigation.

L.1978, c. 95, s. 2C:28-6, eff. Sept. 1, 1979.