Del. Code Ann. tit. 11, § 273
Unless otherwise provided by this Criminal Code or by the statute defining the offense, a person is not liable for an offense committed by another person if:
(3) The person terminates complicity prior to commission of the offense and:
If the actor’s conduct constitutes a separate offense, the actor is liable for that offense only and not for the conduct or offense committed by the other person.
11 Del. C. 1953, § 273; 58 Del. Laws, c. 497, § 1; 70 Del. Laws, c. 186, § 1