(a) A person commits the crime of interference with custody if he knowingly takes or entices:
(1) Any child under the age of 18 from the lawful custody of its parent, guardian or other lawful custodian, or
(2) Any committed person from the lawful custody of its parent, guardian or other lawful custodian. "Committed person" means, in addition to anyone committed under judicial warrant, any neglected, dependent or delinquent child, mentally defective or insane person or any other incompetent person entrusted to another's custody by authority of law.
(b) A person does not commit a crime under this section if the actor's sole purpose is to assume lawful control of the child.
The burden of injecting the issue is on the defendant, but this does not shift the burden of proof.
(c) Interference with custody is a Class C felony.