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.
Substitution of children is a class E felony.
N.Y. Penal Law § 135.55