Conn. Gen. Stat. § 53a-99: Substitution of children: Class D felony.

(a) A person is guilty of substitution of children when, having been temporarily entrusted with a child less than one year old and, intending to deceive a parent, guardian or other lawful custodian of such child, he substitutes, produces or returns to such parent, guardian or custodian a child other than the one entrusted.

(b) Substitution of children is a class D felony.