Conn. Gen. Stat. § 53a-155: Tampering with or fabricating physical evidence: Class D felony.

(a) A person is guilty of tampering with or fabricating physical evidence if, believing that a criminal investigation conducted by a law enforcement agency or an official proceeding is pending, or about to be instituted, such person: (1) Alters, destroys, conceals or removes any record, document or thing with purpose to impair its verity or availability in such criminal investigation or official proceeding; or (2) makes, presents or uses any record, document or thing knowing it to be false and with purpose to mislead a public servant who is or may be engaged in such criminal investigation or official proceeding.

(b) Tampering with or fabricating physical evidence is a class D felony.